@incollection{Laack2012,
  author    = {Laack, Walter van},
  title     = {Elektro- und Ultraschalltherapie},
  series = {Leitfaden Naturheilverfahren : f{\"u}r die {\"a}rztliche Praxis},
  booktitle = {Leitfaden Naturheilverfahren : f{\"u}r die {\"a}rztliche Praxis},
  editor    = {Beer, Andr{\´e}-Michael and Adler, Martin},
  publisher = {Elsevier},
  address   = {Amsterdam},
  isbn      = {978-3-437-56103-0},
  doi       = {10.1016/B978-3-437-56103-0.10013-5},
  pages     = {285 -- 299},
  year      = {2012},
  language  = {de}
}
@book{Laack2012,
  author    = {Laack, Walter van},
  title     = {Schnittstelle Tod: Warum auf ein Danach vertrauen?},
  publisher = {Books on Demand},
  address   = {Norderstedt},
  isbn      = {978-3-936624-14-4},
  pages     = {120 S. : Ill.,graph. Darst.},
  year      = {2012},
  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{Laack2000,
  author    = {Laack, Walter van},
  title     = {Pl{\"a}doyer f{\"u}r ein Leben nach dem Tod und eine etwas andere Sicht der Welt},
  edition   = {2., komplett {\"u}berarb. Aufl.},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-89811-818-7},
  pages     = {447 S. : graph. Darst.},
  year      = {2000},
  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}
}
@book{Laack1999,
  author    = {Laack, Walter van},
  title     = {Der Schl{\"u}ssel zur Ewigkeit},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-9805239-4-3},
  pages     = {285 S.},
  year      = {1999},
  language  = {de}
}
@article{LaackCasser1989,
  author    = {Laack, Walter van and Casser, H. R.},
  title     = {Cortisonbedingte Ablederung der H{\"u}ftkopfkappe / Laack, W. van ; Casser, H. R.},
  series = {Neuere Ergebnisse in der Osteologie : Skelettwachstum, Endoprothetik, Glukokortikoide ; [15. - 18. Februar 1989 in G{\"o}ttingen] / H.-G. Willert ; F. H. W. Heuck (Hrsg.)},
  journal   = {Neuere Ergebnisse in der Osteologie : Skelettwachstum, Endoprothetik, Glukokortikoide ; [15. - 18. Februar 1989 in G{\"o}ttingen] / H.-G. Willert ; F. H. W. Heuck (Hrsg.)},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {3-540-51175-X},
  pages     = {566 -- 568},
  year      = {1989},
  language  = {de}
}