@book{Casper-Hehne:2009,
  author  = "H. Casper-Hehne and N. Burneva and M. Freise and A. Middeke and E. Nemcová and T. Zuchewicz",
  title     = "Russkij azyk bez kul'turnyh granic dla nemeckoazyčnyh studentov: B1 / Matthias Freise, Elena Grimming, Sibille Rigler, ISBN: 9788391817636",
  publisher = "[Sanmedia]",
  address   = "Zielona Góra",
  pages     = "175",
  year      = "2009",
}