@book{LauthHoelderichWagenblast1993,
  author    = {Lauth, Jakob and Hoelderich, Wolfgang and Wagenblast, Gerhard},
  title     = {Molecular sieves containing azo dyes ; Internationale [Pantent]anmeldung WO93/17965 ; Ver{\"o}ffentlichungsdatum: 16.09.1993 / Anmelder: BASF AG},
  publisher = {Weltorganisation f{\"u}r geistiges Eigentum, Internat. B{\"u}ro},
  address   = {[Genf]},
  pages     = {45 S.},
  year      = {1993},
  language  = {en}
}
@book{LauthHoelderichWagenblast1993,
  author    = {Lauth, Jakob and Hoelderich, Wolfgang and Wagenblast, Gerhard},
  title     = {Molekularsiebe, enthaltend Farbstoffe auf Basis von Indigo = Molecular sieves containing indigo-based dyes ; Internationale [Pantent]anmeldung WO 93/17966 ; Ver{\"o}ffentlichungsdatum 16.09.1993 / Anmelder: BASF AG},
  publisher = {Weltorganisation f{\"u}r geistiges Eigentum, Internat. B{\"u}ro},
  address   = {[Genf]},
  pages     = {29 S.},
  year      = {1993},
  language  = {de}
}