@article{HagemannBackhausGoessner2002,
  author    = {Hagemann, Hans-J{\"u}rgen and Backhaus, U. and Goessner, S.},
  title     = {Collaborative eLearning Concepts for University Level Online Laboratory Courses in Engineering. U. Backhaus, S. Goessner, H. J. Hagemann},
  series = {Proceedings Online Educa Berlin: 8th International Conference on Technology Supported Learning \& Training. 2002},
  journal   = {Proceedings Online Educa Berlin: 8th International Conference on Technology Supported Learning \& Training. 2002},
  pages     = {62 -- 66},
  year      = {2002},
  language  = {en}
}
@article{HagemannBreitschuhGraberetal.2004,
  author    = {Hagemann, Hans-J{\"u}rgen and Breitschuh, S. and Graber, S. and Schmitz, G{\"u}nter},
  title     = {Internet Laboratory Courses with Remote Access and Control of Real Measurements on Sensors and Electronic Components},
  series = {Mechatronics \& Robotics 2004 : Aachen, Germany, September 13 - 15, 2004 / [APS - European Centre for Mechatronics]. P. Drews (ed.)},
  journal   = {Mechatronics \& Robotics 2004 : Aachen, Germany, September 13 - 15, 2004 / [APS - European Centre for Mechatronics]. P. Drews (ed.)},
  publisher = {Eysoldt},
  address   = {Aachen},
  isbn      = {3-938153-30-X},
  pages     = {1280 -- 1284},
  year      = {2004},
  language  = {en}
}
@article{HagemannCassidy1994,
  author    = {Hagemann, Hans-J{\"u}rgen and Cassidy, Wiliam D.},
  title     = {Diamond growth rates and quality: dependence on gas phase cpmposition / William D. Cassidy [...], Hans-Jurgen Hagemann},
  series = {Diamond, SiC and nitride wide bandgap semiconductors : symposium held April 4 - 8, 1994, San Francisco, California, U.S.A. / ed.: Calvin H. Carter, Jr. ....},
  journal   = {Diamond, SiC and nitride wide bandgap semiconductors : symposium held April 4 - 8, 1994, San Francisco, California, U.S.A. / ed.: Calvin H. Carter, Jr. ....},
  address   = {Pittsburgh, Penn. ,},
  isbn      = {1-55899-239-1},
  pages     = {285 -- 291},
  year      = {1994},
  language  = {en}
}
@article{HagemannGeittner1990,
  author    = {Hagemann, Hans-J{\"u}rgen and Geittner, P.},
  title     = {PCVD hybrid technology for single mode fibres. Hagemann, H. J.; Geittner, P.},
  series = {Proceedings : papers presented at: the 8th Annual European Fibre Optic Communications and Local Area Networks Exposition},
  journal   = {Proceedings : papers presented at: the 8th Annual European Fibre Optic Communications and Local Area Networks Exposition},
  pages     = {67 -- 72},
  year      = {1990},
  language  = {en}
}
@article{HagemannGeittnerLeers1989,
  author    = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Leers, D.},
  title     = {Intrinsic scattering and absorption losses of Ge- and F-doped optical fibres prepared by PCVD. Geittner, P.; Hagemann, H. J. ; Leers, D.},
  series = {Electronics letters : an intern. publication / The Institution of Electrical Engineers. 25 (1989), H. 7},
  journal   = {Electronics letters : an intern. publication / The Institution of Electrical Engineers. 25 (1989), H. 7},
  isbn      = {0013-5194},
  pages     = {436 -- 437},
  year      = {1989},
  language  = {en}
}
@article{HagemannGeittnerLydtinetal.1988,
  author    = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Lydtin, H. and Warnier, J.},
  title     = {Hybrid technology for large SM-fiber preforms. Geittner, P.; Hagemann, H. J.; Lydtin, H.; Warnier, J.},
  series = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 6 (1988), H. 10},
  journal   = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 6 (1988), H. 10},
  isbn      = {0733-8724},
  pages     = {1451 -- 1454},
  year      = {1988},
  language  = {en}
}
@article{HagemannGeittnerWarnieretal.1985,
  author    = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Warnier, J. and Weling, F.},
  title     = {Reduction of geometric taper losses in the PCVD process. Geittner, P.; Hagemann, H. J.; Warnier, J.; Weling, F.; Wilson, H.},
  series = {Electronics letters : an intern. publication / The Institution of Electrical Engineers. 21 (1985), H. 13},
  journal   = {Electronics letters : an intern. publication / The Institution of Electrical Engineers. 21 (1985), H. 13},
  isbn      = {0013-5194},
  pages     = {870 -- 871},
  year      = {1985},
  language  = {en}
}
@article{HagemannGeittnerWarnieretal.1986,
  author    = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Warnier, J. and Wilson, H.},
  title     = {PCVD at high deposition rates. Geittner, P.; Hagemann, H. J.; Warnier, J.; Wilson, H.},
  series = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 4 (1986), H. 7},
  journal   = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 4 (1986), H. 7},
  isbn      = {0733-8724},
  pages     = {818 -- 822},
  year      = {1986},
  language  = {en}
}
@article{HagemannGudatKunz1974,
  author    = {Hagemann, Hans-J{\"u}rgen and Gudat, W. and Kunz, C.},
  title     = {Photoabsorption of alloys of Al with transition metals V, Fe, Ni and Cu and Pr near the Al L₂,₃-edge},
  series = {Solid State Communications},
  volume    = {15},
  journal   = {Solid State Communications},
  number    = {3},
  publisher = {Elsevier},
  address   = {Amsterdam},
  isbn      = {0038-1098},
  doi       = {10.1016/0038-1098(74)91165-X},
  pages     = {655 -- 658},
  year      = {1974},
  abstract  = {The onset of Al 2p transitions of VAl₃, FeAl, NiAl, NiAl₃, CuAl₂, PrAl₂ and the disordered alloys V-Al (16 at \% Al, 28\%, 41\%), Fe-Al (11\%) is shifted up to 1.1 eV. New pronounced structure develops close to the onset which for NiAl agrees with a density of states calculation by Connolly and Johnson.},
  language  = {en}
}
@article{HagemannGudatKunz1975,
  author    = {Hagemann, Hans-J{\"u}rgen and Gudat, W. and Kunz, C.},
  title     = {Optical constants from the far infrared to the X-ray region: Mg, Al, Cu, Ag, Au, Bi, C, and Al₂O₃},
  series = {Journal of the Optical Society of America (JOSA)},
  volume    = {65},
  journal   = {Journal of the Optical Society of America (JOSA)},
  number    = {6},
  publisher = {Optical Society of America},
  address   = {New York},
  isbn      = {0030-3941},
  doi       = {10.1364/JOSA.65.000742},
  pages     = {742 -- 744},
  year      = {1975},
  language  = {en}
}