@techreport{HebelMerkensFeyerletal.2021,
  author    = {Hebel, Christoph and Merkens, Torsten and Feyerl, G{\"u}nter and Kemper, Hans and Busse, Daniel},
  title     = {Elektromobilit{\"a}t - Verbundprojekt "COSTARTebus": Comprehensive strategy to accelerate the integration of electric-buses into existing public transport systems - Teilprojekt A : Berichtszeitraum: 01.01.2018-31.10.2020},
  publisher = {Fachhochschule Aachen},
  address   = {Aachen},
  pages     = {219 Seiten},
  year      = {2021},
  language  = {de}
}
@article{EschSalberKemperetal.2001,
  author    = {Esch, Thomas and Salber, W. and Kemper, Hans and Staay, F. van der},
  title     = {Der elektromechanische Ventiltrieb - Systembaustein f{\"u}r zuk{\"u}nftige Antriebskonzepte, Teil 2.},
  series = {Motortechnische Zeitschrift (MTZ).},
  volume    = {62},
  journal   = {Motortechnische Zeitschrift (MTZ).},
  number    = {1},
  publisher = {Springer Nature},
  address   = {Basel},
  issn      = {0024-8525},
  doi       = {10.1007/bf03227081},
  pages     = {44 -- 55},
  year      = {2001},
  language  = {de}
}
@article{EschSalberKemperetal.2000,
  author    = {Esch, Thomas and Salber, W. and Kemper, Hans and Staay, F. van der},
  title     = {Der elektromechanische Ventiltrieb - Systembaustein f{\"u}r zuk{\"u}nftige Antriebskonzepte, Teil 1.},
  series = {Motortechnische Zeitschrift (MTZ).},
  volume    = {61},
  journal   = {Motortechnische Zeitschrift (MTZ).},
  number    = {12},
  publisher = {Springer Nature},
  address   = {Basel},
  issn      = {0024-8525},
  doi       = {10.1007/bf03227081},
  pages     = {826 -- 836},
  year      = {2000},
  language  = {de}
}