@article{Więckowski:2009,
author
=
"A.Więckowski",
title
=
"Thermally excited multiplet states in coal macerals",
journal
=
"Bulletin of the Polish Academy of Sciences : Chemistry",
volume
=
"Vol. 48",
number
=
"no 4",
pages
=
"385--395",
year
=
"2000",
}