@techreport{ViethHammerMaier2005,
  type      = {Working Paper},
  author    = {Vieth, Matthias and Hammer, A. and Maier, F.},
  title     = {A critical analysis of the co-plot method},
  series = {International University in Germany, School of Business Administration / Working paper},
  journal   = {International University in Germany, School of Business Administration / Working paper},
  number    = {32},
  publisher = {School of Business Administration, Intern. Univ. in Germany},
  address   = {Bruchsal},
  pages     = {22 Bl{\"a}tter},
  year      = {2005},
  language  = {en}
}
@article{PietschKurbel1990,
  author    = {Pietsch, Wolfram and Kurbel, Karl},
  title     = {A Cooperative Work Environment for Evolutionary Software Development / Kurbel, K., Pietsch, W.},
  series = {Multi-user interfaces and applications : proceedings of the IFIP WG 8.4 Conference on Multi-User Interfaces and Applications, Heraklion, Crete, Greece, 24 - 26 September, 1990 / ed. by Simon Gibbs ...},
  journal   = {Multi-user interfaces and applications : proceedings of the IFIP WG 8.4 Conference on Multi-User Interfaces and Applications, Heraklion, Crete, Greece, 24 - 26 September, 1990 / ed. by Simon Gibbs ...},
  publisher = {North-Holland Publ.},
  address   = {Amsterdam [u.a.]},
  isbn      = {0-444-88760-1},
  pages     = {115 -- 127},
  year      = {1990},
  language  = {en}
}
@inproceedings{WeberMarkovicDrumm2007,
  author    = {Weber, Ingo and Markovic, Ivan and Drumm, Christian},
  title     = {A conceptual framework for composition in business process management},
  series = {Business Information Systems : 10th International Conference, BIS 2007, Poznan, Poland, April 25-27, 2007. Proceedings},
  booktitle = {Business Information Systems : 10th International Conference, BIS 2007, Poznan, Poland, April 25-27, 2007. Proceedings},
  publisher = {Springer},
  address   = {Berlin, Heidelberg},
  isbn      = {978-3-540-72035-5},
  doi       = {10.1007/978-3-540-72035-5_5},
  pages     = {54 -- 66},
  year      = {2007},
  language  = {en}
}
@book{JanzEblingGottschalketal.1999,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Gottschalk, Sandra and Niggemann, Hiltrud},
  title     = {2nd Community Innovation Survey. Final Report. Report prepared for Eurostat / Ebling, G. , S. Gottschalk, N. Janz und H. Niggemann},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsforschung},
  address   = {Mannheim},
  year      = {1999},
  language  = {en}
}
@book{JanzEblingGottschalketal.1999,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Gottschalk, Sandra and Niggemann, Hiltrud},
  title     = {2nd Community Innovation Survey. 2nd Interim Report. Report prepared for Eurostat / Ebling, G. , S. Gottschalk, N. Janz und H. Niggemann},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsforschung},
  address   = {Mannheim},
  year      = {1999},
  language  = {en}
}
@book{JanzEblingNiggemannetal.1998,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Niggemann, Hiltrud and Stahl, Harald},
  title     = {2nd Community Innovation Survey. 1st Interim Report. Report prepared for Eurostat / Ebling, G., N. Janz, H. Niggemann und H. Stahl},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsf{\"o}rderung},
  address   = {Mannheim},
  year      = {1998},
  language  = {en}
}
@inproceedings{FredebeulKrein2007,
  author    = {Fredebeul-Krein, Markus},
  title     = {10 years of liberalised telecom markets in Germany: Assessing the degree of competition on the markets for voice telephony},
  year      = {2007},
  abstract  = {Market data for the German telecom market shows that Deutsche Telekom as the former incumbent is constantly loosing shares on all arkets for voice telephony: the market for local calls, the market for long-distance calls and the market for international calls. At the same time prices decline steadily with the latest trend being that operators offer voice services free of charge, the costs of which are covered by a monthly subscription charge. Against this background the paper examines the state of policy and regulatory reform in the telecommunications sector in Germany almost 10 years after the liberalisation of the fixed telecommunications market. Thereby the focus is on the analysis of the competitive conditions that have been established on the German market for voice telephony services. If these retail markets are competitive, there might be a need to remove remaining regulatory provisions. In the new environment of converging markets the future challenge of regulating fixed telecom markets might be to ensure that access to the network and/or services of a potentially dominant provider in a relevant market will satisfy requirements for openness and non-discrimination.},
  subject      = {Telekommunikationsmarkt},
  language  = {en}
}