@article{Hassler1996,
  author    = {Haßler, Gerda},
  title     = {El valor citativo de las formas verbales},
  year      = {1996},
  language  = {es}
}
@book{LeggenLeggen1996,
  author    = {Leggen, Brigitte and Leggen, Dirk},
  title     = {Teritorios Ind{\´i}genas y Grandes Proyectos Cauca / Nari{\~n}o : Regionalkarte},
  address   = {Potsdam},
  year      = {1996},
  language  = {es}
}
@book{LeggenLeggen1996,
  author    = {Leggen, Brigitte and Leggen, Dirk},
  title     = {Teritorios Ind{\´i}genas y Grandes Proyectos Santa Marta / Guajira : Regionalkarte},
  address   = {Potsdam},
  year      = {1996},
  language  = {es}
}