@article{Drgas-Burchardt:2009,
author
=
"E.Drgas-Burchardt and E.Łazuka",
title
=
"Chromatic polynomials of hypergraphs",
journal
=
"Applied Mathematics Letters",
volume
=
"Vol. 20",
number
=
"no 12",
pages
=
"1250--1254",
year
=
"2007",
}