@article{Słowik:2010,
author
=
"G.Słowik and A.Więckowski",
title
=
"Paramagnetic centres in coal macerals",
journal
=
"Acta Physica Polonica A",
volume
=
"Vol. 118",
number
=
"no 3",
pages
=
"507--510",
year
=
"2010",
}