@book{Laumann2003,
  author    = {Laumann, J{\"o}rg},
  title     = {Zur Berechnung der Eigenwerte und Eigenformen f{\"u}r Stabilit{\"a}tsprobleme des Stahlbaus / J{\"o}rg E. Laumann},
  publisher = {VDI-Verl.},
  address   = {D{\"u}sseldorf},
  isbn      = {3-18-319304-3},
  pages     = {VIII, 154 S. : graph. Darst.},
  year      = {2003},
  language  = {de}
}
@book{Laumann2005,
  author    = {Laumann, J{\"o}rg},
  title     = {Vereinfachte Ermittlung der Einspanntiefe von Stahlst{\"u}tzen in Beton f{\"u}r I-Querschnitte und Biegung um die starke Achse},
  publisher = {Ruhr-Univ. Bochum, Lehrstuhl f{\"u}r Stahl- und Verbundbau},
  address   = {Bochum},
  pages     = {4 S.},
  year      = {2005},
  language  = {de}
}
@book{Laumann2004,
  author    = {Laumann, J{\"o}rg},
  title     = {Ermittlung von Eigenwerten mit dem GAUCHO-Verfahren},
  publisher = {Ruhr-Univ. Bochum, Lehrstuhl f{\"u}r Stahl- und Verbundbau},
  address   = {Bochum},
  pages     = {3 S.},
  year      = {2004},
  language  = {de}
}
@book{Laumann2003,
  author    = {Laumann, J{\"o}rg},
  title     = {Geometrische Ersatzimperfektionen beim Biegedrillknicken von Kragtr{\"a}gern},
  publisher = {Ruhr-Univ. Bochum, Lehrstuhl f{\"u}r Stahl- und Verbundbau},
  address   = {Bochum},
  pages     = {2 S.},
  year      = {2003},
  language  = {de}
}
@book{Lassonczyk1987,
  author    = {Lassonczyk, Beate},
  title     = {Immobilisierung l{\"o}slicher organischer Stoffe aus Auflagehorizonten in Sandb{\"o}den},
  address   = {Bonn},
  pages     = {140 S. : graph. Darst.},
  year      = {1987},
  language  = {de}
}
@book{Lassonczyk1988,
  author    = {Lassonczyk, Beate},
  title     = {Verbreitung, Genese und Standorteigenschaften von B{\"o}den im Algarve / Jahn, Reinhold , K. Stahr und B. Lassonczyk (Hrsg.)},
  publisher = {Techn. Univ., Univ.-Bibliothek, Abt. Publ.},
  address   = {Berlin},
  isbn      = {3-7983-1237-0},
  pages     = {VI, 177 S. : Ill., graph. Darst.},
  year      = {1988},
  language  = {de}
}
@book{LabischWaehlisch2017,
  author    = {Labisch, Susanna and W{\"a}hlisch, Georg},
  title     = {Technisches Zeichnen: Eigenst{\"a}ndig lernen und effektiv {\"u}ben},
  edition   = {5. Aufl.},
  publisher = {Springer Fachmedien},
  address   = {Wiesbaden},
  isbn      = {978-3-658-18313-4},
  doi       = {10.1007/978-3-658-18313-4},
  pages     = {XI, 300 S. 291 Abb., 50 Abb. in Farbe},
  year      = {2017},
  language  = {de}
}
@book{LabischWaehlisch2020,
  author    = {Labisch, Susanna and W{\"a}hlisch, Georg},
  title     = {Technisches Zeichnen: Eigenst{\"a}ndig lernen und effektiv {\"u}ben},
  edition   = {6th ed.},
  publisher = {Springer Vieweg},
  address   = {Wiesbaden},
  isbn      = {978-3-658-30650-2 (E-Book)},
  doi       = {10.1007/978-3-658-30650-2},
  pages     = {Online-Ressource (XI, 296 S. 300 Abb., 81 Abb. in Farbe)},
  year      = {2020},
  language  = {de}
}
@book{LabischWaehlisch2017,
  author    = {Labisch, Susanna and W{\"a}hlisch, Georg},
  title     = {Technisches Zeichnen: Eigenst{\"a}ndig lernen und effektiv {\"u}ben},
  edition   = {5. {\"u}berarbeitete Auflage},
  publisher = {Springer Vieweg},
  address   = {Wiesbaden},
  isbn      = {978-3-658-18312-7},
  doi       = {10.1007/978-3-658-18313-4},
  pages     = {XI, 300 Seiten ; Illustrationen},
  year      = {2017},
  language  = {de}
}
@book{Laack1982,
  author    = {Laack, Walter van},
  title     = {Experimentelle Untersuchungen {\"u}ber die Wirksamkeit von Schienbeinschonern im Fußballsport},
  address   = {Aachen},
  pages     = {187 S. : Ill.; graph. Darst.},
  year      = {1982},
  language  = {de}
}
@book{Laack2000,
  author    = {Laack, Walter van},
  title     = {Eine bessere Geschichte unserer Welt / Bd. 1. Das Universum},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-8311-0345-4},
  pages     = {196 S.},
  year      = {2000},
  language  = {de}
}
@book{Laack2001,
  author    = {Laack, Walter van},
  title     = {Eine bessere Geschichte unserer Welt / Bd. 2. Das Leben},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-8311-2114-4},
  pages     = {248 S.},
  year      = {2001},
  language  = {de}
}
@book{Laack2002,
  author    = {Laack, Walter van},
  title     = {Eine bessere Geschichte unserer Welt / Bd. 3. Der Tod},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-8311-3581-3},
  pages     = {248 S.},
  year      = {2002},
  language  = {de}
}
@book{Laack2001,
  author    = {Laack, Walter van},
  title     = {A better history of our world / Vol. 1. The universe},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-8311-1490-0},
  pages     = {188 S.},
  year      = {2001},
  language  = {en}
}
@book{Laack2002,
  author    = {Laack, Walter van},
  title     = {A better history of our world / Vol. 2. Life},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-8311-2597-5},
  pages     = {236 S.},
  year      = {2002},
  language  = {en}
}
@book{Laack2003,
  author    = {Laack, Walter van},
  title     = {A better history of our world / Vol. 3. Death},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-936624-01-4},
  pages     = {276 S.},
  year      = {2003},
  language  = {en}
}
@book{Laack2000,
  author    = {Laack, Walter van},
  title     = {Key to Eternity / Walter van Laack. [Transl. by Anneliese Wolstenholme]},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-8311-0344-7},
  pages     = {256 S.},
  year      = {2000},
  language  = {en}
}
@book{Laack2010,
  author    = {Laack, Walter van},
  title     = {Schnittstelle Tod: Aufbruch zu neuem Leben?},
  publisher = {Books on Demand},
  address   = {Norderstedt},
  isbn      = {978-3-936624-10-6},
  pages     = {144 S. : Ill., graph. Darst.},
  year      = {2010},
  language  = {de}
}
@book{Laack2005,
  author    = {Laack, Walter van},
  title     = {Mit Logik die Welt begreifen},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-936624-07-6},
  pages     = {380 S. : Ill., graph. Darst.},
  year      = {2005},
  language  = {de}
}
@book{Laack2011,
  author    = {Laack, Walter van},
  title     = {Wer stirbt, ist nicht tot! 2. Aufl.},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-936624-13-7},
  pages     = {272 S.},
  year      = {2011},
  language  = {de}
}