@book{OPUS4-33360,
  title     = {Wprowadzenie do historii sredniowiecznej},
  editor    = {Heimann, Heinz-Dieter},
  publisher = {TNOIK},
  address   = {Turun},
  isbn      = {83-876773-73-0},
  pages     = {368 S.},
  year      = {1999},
  language  = {pl}
}
@article{Groezinger1999,
  author    = {Gr{\"o}zinger, Elvira},
  title     = {Powr{\´o}t Ahaswera : Watki zydowskie w dzisiejszey literaturze polskiej},
  year      = {1999},
  language  = {pl}
}