@book{Borowiecki:1997,
author
=
"M.Borowiecki",
title
=
"Discussiones Mathematicae - Graph Theory, ISSN: 1234-3099",
publisher
=
"Technical University Press",
address
=
"Zielona Góra",
year
=
"1997",
volume
=
"Vol.17(no 1-2) ",
number
=
"no 1-2",
}