@article{HagemannLadeWarnieretal.1991,
  author    = {Hagemann, Hans-J{\"u}rgen and Lade, H. and Warnier, J. and Wiechert, D. U.},
  title     = {The performance of Depressed-Cladding Single-Mode Fibres with Different b/a Ratios. Hagemann, H.-J.; Lade, H.; Warnier, J.; Wiechert, D. U.},
  series = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 9 (1991), H. 6},
  journal   = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 9 (1991), H. 6},
  isbn      = {0733-8724},
  pages     = {689 -- 694},
  year      = {1991},
  language  = {en}
}
@article{HagemannWiechert1992,
  author    = {Hagemann, Hans-J{\"u}rgen and Wiechert, D. U.},
  title     = {Measurements and calculations of the LP01 intensity of SM fibres far off the core. Hagemann, H.-J.; Wiechert, D. U.},
  series = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 10 (1992), H. 4},
  journal   = {Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 10 (1992), H. 4},
  isbn      = {0733-8724},
  pages     = {407 -- 412},
  year      = {1992},
  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{HagemannOBryan1987,
  author    = {Hagemann, Hans-J{\"u}rgen and O´Bryan, H. M.},
  title     = {Grain boundary and surface segragation of Ba-Ti-O-Phases in rutile. O´Bryan, H. M.; Hagemann, H. J.},
  series = {Journal of the American Ceramic Society. 70 (1987)},
  journal   = {Journal of the American Ceramic Society. 70 (1987)},
  isbn      = {0002-7820},
  pages     = {274 -- 278},
  year      = {1987},
  language  = {en}
}
@article{MuellerVeggianBeuscherGono1978,
  author    = {M{\"u}ller-Veggian, Mattea and Beuscher, H. and Gono, Y.},
  title     = {Systematics of 10⁺ isomers in the N=78 nuclei},
  series = {Annual report 1977 / Institut f{\"u}r Kernphysik Kernforschungsanlage J{\"u}lich},
  journal   = {Annual report 1977 / Institut f{\"u}r Kernphysik Kernforschungsanlage J{\"u}lich},
  publisher = {Verlag des Forschungszentrums J{\"u}lich},
  address   = {J{\"u}lich},
  pages     = {33 -- 34},
  year      = {1978},
  language  = {en}
}
@article{MuellerVeggianBeuscherHaenni1978,
  author    = {M{\"u}ller-Veggian, Mattea and Beuscher, H. and Haenni, D. R.},
  title     = {Evidence for a 10⁺ isomer in ¹³⁴ Ce},
  series = {Annual report 1977 / Institut f{\"u}r Kernphysik Kernforschungsanlage J{\"u}lich},
  journal   = {Annual report 1977 / Institut f{\"u}r Kernphysik Kernforschungsanlage J{\"u}lich},
  publisher = {Verlag des Forschungszentrums J{\"u}lich},
  address   = {J{\"u}lich},
  pages     = {30 -- 32},
  year      = {1978},
  language  = {en}
}
@article{MuellerVeggianBeuscherLieder1978,
  author    = {M{\"u}ller-Veggian, Mattea and Beuscher, H. and Lieder, R. M.},
  title     = {High-spin isomer in ¹³⁷ Ce},
  series = {Annual report 1977 / Institut f{\"u}r Kernphysik Kernforschungsanlage J{\"u}lich},
  journal   = {Annual report 1977 / Institut f{\"u}r Kernphysik Kernforschungsanlage J{\"u}lich},
  publisher = {Verlag des Forschungszentrums J{\"u}lich},
  address   = {J{\"u}lich},
  pages     = {32 -- 33},
  year      = {1978},
  language  = {en}
}
@article{HagemannGeittnerSchnittkeretal.1989,
  author    = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Schnittker, W. and Warnier, J.},
  title     = {Abscheidegeschwindigkeiten und Prozeßausbeuten im PCVD-Verfahren. Geittner, P.; Hagemann, H. J.; Schnittker, W.; Warnier, J.; Weling, F.; Wilson, H.},
  series = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  journal   = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  pages     = {140 -- 143},
  year      = {1989},
  language  = {de}
}
@article{Hagemann1989,
  author    = {Hagemann, Hans-J{\"u}rgen},
  title     = {St{\"o}rstellengleichgewichte in eisendotierten Titanaten. Hagemann, H. J.},
  series = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  journal   = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  pages     = {170 -- 172},
  year      = {1989},
  language  = {de}
}
@article{HagemannHeroGonser1980,
  author    = {Hagemann, Hans-J{\"u}rgen and Hero, A. and Gonser, U.},
  title     = {The valence change of Fe in BaTiO3 studied by M{\"o}ßbauer effect and gravimetry. Hagemann, H. J.; Hero, A.; Gonser, U.},
  series = {Physica Status Solidi (A) - Applied Research. 61 (1980)},
  journal   = {Physica Status Solidi (A) - Applied Research. 61 (1980)},
  isbn      = {0031-8965},
  pages     = {63 -- 72},
  year      = {1980},
  language  = {en}
}