@book{Kisielewicz:1981,
  editor    = "M. Kisielewicz",
  title     = "Functional-differential system and related topics : proceedings of the second international conference held at Błażejewko",
  publisher = "Higher College of Engineering",
  address   = "Zielona Góra",
  pages     = "340",
  year      = "1981",
}