@book{LauthMuellerHoelderich1993,
  author    = {Lauth, Jakob and M{\"u}ller, Ulrich and Hoelderich, Wolfgang},
  title     = {Farbige, kristalline Alumophosphate und/oder Silicoalumophosphate vom AEL-Typ oder VFI-Typ ; Europ{\"a}ische Patentanmeldung EP0534289A1 ; Ver{\"o}ffentlichungstag im Patentblatt: 06.05.1993 / BASF AG, 6700 Ludwigshafen. Erfinder: G{\"u}nther Lauth; Ulrich M{\"u}ller ; Wolfgang Hoelderich ...},
  publisher = {Europ{\"a}isches Patentamt},
  address   = {[M{\"u}nchen u.a.]},
  pages     = {15 S.},
  year      = {1993},
  language  = {de}
}
@misc{LauthMuellerHoelderich1994,
  author    = {Lauth, Jakob and M{\"u}ller, Ulrich and Hoelderich, Wolfgang},
  title     = {Colored crystalline aluminophosphates and/or silicoaluminophosphates of the AEL or VFI type : United States Patent ; patent number 5,360,474 ; date of patent: Nov. 1, 1994 / assignee: BASF Aktiengesellschaft},
  publisher = {[United States Trademark and Patent Office]},
  address   = {[Alexandria, VA]},
  pages     = {12 S. : Ill.},
  year      = {1994},
  language  = {en}
}
@misc{LauthMuellerHoelderich1994,
  author    = {Lauth, Jakob and M{\"u}ller, Ulrich and Hoelderich, Wolfgang},
  title     = {Preparation of aluminophosphates and silicoaluminophosphates having the AEL structure using 1,2-bis-( 4-pyridyl)-ethane : United States Patent ; patent number 5,324,493 ; date of patent: Jun. 28, 1994 / assignee: BASF Aktiengesellschaft. Inventors: Ulrich Mueller ; Wolfgang Hoelderich ; Guenter Lauth},
  publisher = {[United States Trademark and Patent Office]},
  address   = {[Alexandria, VA]},
  pages     = {6 S. : Ill.},
  year      = {1994},
  language  = {en}
}