@article{Brešar:2009,
author
=
"B.Brešar and J.Grytczuk and S.Klavžar and S.Niwczyk and I.Peterin",
title
=
"Nonrepetitive colorings of trees",
journal
=
"Discrete Mathematics",
volume
=
"Vol. 307",
number
=
"no 2",
pages
=
"163--172",
year
=
"2007",
}