@inproceedings{Ritz2001,
  author    = {Ritz, Thomas},
  title     = {DISMED - an innovation portal for printing and media industry},
  series = {CRIS 2000 : the fifth conference on Current Research Information Systems in Europe, in Helsinki (Finland), 25-27 May 2000},
  booktitle = {CRIS 2000 : the fifth conference on Current Research Information Systems in Europe, in Helsinki (Finland), 25-27 May 2000},
  publisher = {CORDIS Archive},
  address   = {[s.l.]},
  pages     = {9 S. : graph. Darst.},
  year      = {2001},
  language  = {en}
}
@article{FerreinBeckLakemeyer2009,
  author    = {Ferrein, Alexander and Beck, Daniel and Lakemeyer, Gerhard},
  title     = {Landmark-Based Representations for Navigating Holonomic Soccer Robots / Beck, Daniel ; Ferrein, Alexander ; Lakemeyer, Gerhard},
  series = {RoboCup 2008 : robot soccer world cup XII / Luca Iocchi ... (eds.)},
  journal   = {RoboCup 2008 : robot soccer world cup XII / Luca Iocchi ... (eds.)},
  publisher = {Springer},
  address   = {Heidelberg},
  isbn      = {978-3-642-02921-9},
  pages     = {25 -- 36},
  year      = {2009},
  language  = {en}
}
@article{HeuermannSadeghfam2008,
  author    = {Heuermann, Holger and Sadeghfam, Arash},
  title     = {Electrically tunable bandpass filter with integrated carrier suppression for UHF RFID systems / Sadeghfam, Arash ; Heuermann, Holger},
  series = {European Conference on Wireless Technology, 2008. EuWiT 2008.},
  journal   = {European Conference on Wireless Technology, 2008. EuWiT 2008.},
  isbn      = {978-2-87487-008-8},
  pages     = {306 -- 309},
  year      = {2008},
  language  = {en}
}
@article{Heuermann2008,
  author    = {Heuermann, Holger},
  title     = {Calibration of a Network Analyzer Without a Thru Connection for Nonlinear and Multiport Measurements},
  series = {IEEE Transactions on Microwave Theory and Techniques. 56 (2008), H. 11, 1},
  journal   = {IEEE Transactions on Microwave Theory and Techniques. 56 (2008), H. 11, 1},
  isbn      = {0018-9480},
  pages     = {2505 -- 2510},
  year      = {2008},
  language  = {en}
}
@article{HeuermannThalayasingam2009,
  author    = {Heuermann, Holger and Thalayasingam, K.},
  title     = {Novel vector non-linear measurement system for intermodulation measurements / Thalayasingam, K.; Heuermann, H.},
  series = {European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE},
  journal   = {European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE},
  publisher = {IEEE},
  address   = {Piscataway, NJ},
  isbn      = {978-1-4244-4748-0},
  pages     = {926 -- 929},
  year      = {2009},
  language  = {en}
}
@article{RitzStender2006,
  author    = {Ritz, Thomas and Stender, Michael},
  title     = {Modeling of B2B mobile commerce processes},
  series = {International Journal of Production Economics},
  volume    = {101},
  journal   = {International Journal of Production Economics},
  number    = {1},
  issn      = {0925-5273},
  doi       = {10.1016/j.ijpe.2005.05.017},
  pages     = {128 -- 139},
  year      = {2006},
  language  = {en}
}
@article{WolfFoltzSchlicketal.1999,
  author    = {Wolf, Martin R. and Foltz, Christian and Schlick, Christopher and Luczak, Holger},
  title     = {Groupware support for chemical process design / Wolf, M.; Foltz, C.; Schlick, C.; Luczak, H.},
  series = {Human-computer interaction : proceedings of HCI International '99 (the 8th International Conference on Human-Computer Interaction), Munich, Germany, August 22 - 26, 1999},
  journal   = {Human-computer interaction : proceedings of HCI International '99 (the 8th International Conference on Human-Computer Interaction), Munich, Germany, August 22 - 26, 1999},
  publisher = {Erlbaum},
  address   = {Mahwah, NJ},
  pages     = {343 -- 347},
  year      = {1999},
  language  = {en}
}
@inproceedings{KoenigWolf2016,
  author    = {K{\"o}nig, Johannes Alexander and Wolf, Martin R.},
  title     = {The pyramid assessment framework for 'competence developing games'},
  series = {Communications in Computer and Information Science},
  volume    = {618},
  booktitle = {Communications in Computer and Information Science},
  editor    = {Stephanidis, C.},
  publisher = {Springer},
  isbn      = {978-331940541-4},
  issn      = {1865-0929},
  doi       = {10.1007/978-3-319-40542-1_37},
  pages     = {232 -- 237},
  year      = {2016},
  language  = {en}
}
@inproceedings{MarcoFerrein2017,
  author    = {Marco, Heather G. and Ferrein, Alexander},
  title     = {AGNES: The African-German Network of Excellence in Science},
  series = {Proceedings of the 2nd Developing World Robotics Forum, Workshop at IEEE AFRICON 2017},
  booktitle = {Proceedings of the 2nd Developing World Robotics Forum, Workshop at IEEE AFRICON 2017},
  pages     = {1 -- 2},
  year      = {2017},
  language  = {en}
}
@inproceedings{FuchsRitz2014,
  author    = {Fuchs, Britta and Ritz, Thomas},
  title     = {Usability for Blended Shopping - Solving Major Flaws by Applying Usability Engineering and Proven Integration Technologies},
  series = {Proceedings of the 11th International Conference on e-Business, ICE-B 2014, Vienna, Austria},
  booktitle = {Proceedings of the 11th International Conference on e-Business, ICE-B 2014, Vienna, Austria},
  isbn      = {978-989-758-043-7},
  doi       = {10.5220/0005113502160223},
  pages     = {216 -- 223},
  year      = {2014},
  language  = {en}
}
@article{HeuermannSadeghfamBoehm2005,
  author    = {Heuermann, Holger and Sadeghfam, Arash and Boehm, H.},
  title     = {Ultra Compact Multi-Mode Filter with Novel Rat-Race Inductor. Sadeghfam, Arash; Heuermann, Holger; Boehm, H.},
  series = {Conference proceedings : 3 - 7 October 2005, CNIT la D{\´e}fense, Paris, France; [comprises the] 35th European Microwave Conference 2005 ; The European Conference on Wireless Technology 2005 ; European Radar Conference 2005 ; GAAS 2005, The European Gallium A. Vol. 2},
  journal   = {Conference proceedings : 3 - 7 October 2005, CNIT la D{\´e}fense, Paris, France; [comprises the] 35th European Microwave Conference 2005 ; The European Conference on Wireless Technology 2005 ; European Radar Conference 2005 ; GAAS 2005, The European Gallium A. Vol. 2},
  publisher = {Horizon House Publ},
  address   = {London},
  isbn      = {2-9600551-0-1},
  pages     = {4 pp.},
  year      = {2005},
  language  = {en}
}
@article{SchifferFerreinLakemeyer2010,
  author    = {Schiffer, Stefan and Ferrein, Alexander and Lakemeyer, Gerhard},
  title     = {Proceedings of the Fourth International Conference on Intelligent Robotics and Applications (ICIRA 2011)},
  series = {Proceedings of the Fourth International Conference on Intelligent Robotics and Applications (ICIRA 2011)},
  journal   = {Proceedings of the Fourth International Conference on Intelligent Robotics and Applications (ICIRA 2011)},
  pages     = {1 -- 10},
  year      = {2010},
  language  = {en}
}
@inproceedings{HarzheimHeuermann2018,
  author    = {Harzheim, Thomas and Heuermann, Holger},
  title     = {Phase Repeatable Synthesizers as a New Harmonic Phase Standard for Nonlinear Network Analysis},
  series = {IEEE Transactions on Microwave Theory and Techniques},
  booktitle = {IEEE Transactions on Microwave Theory and Techniques},
  publisher = {IEEE},
  doi       = {10.1109/TMTT.2018.2817513},
  pages     = {1 -- 8},
  year      = {2018},
  language  = {en}
}
@article{HeuermannSchiek1993,
  author    = {Heuermann, Holger and Schiek, Burkhard},
  title     = {LNN( Line-Network-Network): The In-Fixture Calibration Procedure},
  pages     = {149 -- 149},
  year      = {1993},
  language  = {en}
}
@article{HeuermannSchiek1992,
  author    = {Heuermann, Holger and Schiek, Burkhard},
  title     = {A Generalization of the Txx Network Analyzer Self-Calibration Procedure},
  series = {Conference proceedings : monday 24th to thursday 27th august 1992, Helsinki University of Technology, Espoo, Finland ; [the international conference and exhibition designed for the Microwave Community]. Vol. 2},
  journal   = {Conference proceedings : monday 24th to thursday 27th august 1992, Helsinki University of Technology, Espoo, Finland ; [the international conference and exhibition designed for the Microwave Community]. Vol. 2},
  publisher = {Microwave Exhibitions and Publishers},
  address   = {Tunbridge Wells},
  isbn      = {0-946821-77-1},
  pages     = {907 -- 912},
  year      = {1992},
  language  = {en}
}
@article{HeuermannSchiek1997,
  author    = {Heuermann, Holger and Schiek, B.},
  title     = {15-term self-calibration methods for the error-correction of on-wafer measurements},
  series = {IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5},
  journal   = {IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5},
  isbn      = {0018-9456},
  pages     = {1105 -- 1110},
  year      = {1997},
  language  = {en}
}
@article{WolfLuczakSpringeretal.1997,
  author    = {Wolf, Martin R. and Luczak, Holger and Springer, J. and Simon, S.},
  title     = {The role of metaphors in computer supported cooperative work},
  series = {Proceedings of WWDU '97 Tokyo, Fifth International Scientific Conference on Work with Display Units : November 3 - 5, 1997, Tokyo /},
  journal   = {Proceedings of WWDU '97 Tokyo, Fifth International Scientific Conference on Work with Display Units : November 3 - 5, 1997, Tokyo /},
  editor    = {Miyamoto, Hiroyuki},
  publisher = {-},
  address   = {Tokyo},
  pages     = {191 -- 192},
  year      = {1997},
  language  = {en}
}
@incollection{HeuermannFinger2014,
  author    = {Heuermann, Holger and Finger, Torsten},
  title     = {Microwave Spark Plug for Very High-Pressure Conditions},
  series = {Ignition systems for gasoline engines},
  booktitle = {Ignition systems for gasoline engines},
  editor    = {G{\"u}nther, Michael},
  publisher = {DCM Druck},
  address   = {Meckenheim},
  pages     = {269 -- 282},
  year      = {2014},
  language  = {en}
}
@article{SteinbauerFerrein2016,
  author    = {Steinbauer, Gerald and Ferrein, Alexander},
  title     = {20 Years of RoboCup},
  series = {KI - K{\"u}nstliche Intelligenz},
  volume    = {30},
  journal   = {KI - K{\"u}nstliche Intelligenz},
  number    = {3-4},
  publisher = {Springer},
  address   = {Berlin},
  issn      = {1610-1987},
  doi       = {10.1007/s13218-016-0442-z},
  pages     = {221 -- 224},
  year      = {2016},
  language  = {en}
}
@article{FerreinFritzLakemeyer2003,
  author    = {Ferrein, Alexander and Fritz, Christian and Lakemeyer, Gerhard},
  title     = {Extending DTGOLOG with Options / Ferrein, Alexander ; Fritz, Christian ; Lakemeyer, Gerhard},
  series = {IJCAI-03, Proceedings of the Eighteenth International Joint Conference on Artificial Intelligence, Acapulco, Mexico, August 9-15, 2003},
  journal   = {IJCAI-03, Proceedings of the Eighteenth International Joint Conference on Artificial Intelligence, Acapulco, Mexico, August 9-15, 2003},
  pages     = {1391 -- 1393},
  year      = {2003},
  language  = {en}
}