@book{Borowiecki:2017,
  editor    = "M. Borowiecki",
  title     = "Discussiones Mathematicae : Graph Theory, ISSN: 1234-3099",
  publisher = "University of Zielona Góra Press",
  address   = "Zielona Góra",
  year      = "2017",
  number    = "no. 1-2",
}