@inbook{231,
  author = {Gerta Keller},
  title = {Mass extinction and evolution patterns across the Cretaceous-Tertiary boundary},
  year = {1994},
  journal = {Extincion y Registro fosil, Cuadernos Interdisciplinares No. 5},
  pages = {165-200},
  publisher = {Universidad de Zaragoza},
  address = {Zaragoza},
  language = {eng},
}