@phdthesis{Prifti2011,
  author    = {Prifti, Elton},
  title     = {Italoamericano : italiano e inglese in contatto negli USA ; linguistica variazionale e linguistica migrazonale},
  address   = {Potsdam},
  pages     = {401 S.},
  year      = {2011},
  language  = {it}
}
@phdthesis{Pfaff2011,
  author    = {Pfaff, Isolde},
  title     = {Gr{\´i}co - Salentino - Italiano : Migration, Sprachvariationen und Sprachdynamik in S{\"u}ditalien},
  address   = {Potsdam},
  pages     = {255 S.},
  year      = {2011},
  language  = {de}
}
@phdthesis{HasslerVolkmann2011,
  author    = {Haßler, Gerda and Volkmann, Gesina},
  title     = {Temporalidad y deixis m{\´u}ltiple en textos narrativos},
  isbn      = {978-3-631-62057-1},
  year      = {2011},
  language  = {es}
}