@article{Więckowski:2009,
author
=
"A.Więckowski and B.Pilawa and M.Lewandowski and W.Wojtowicz and G.Słowik",
title
=
"Paramagnetic centres in exinite, vitrinite and inertinite",
journal
=
"Applied Magnetic Resonance",
volume
=
"Vol. 15",
number
=
"no 3-4",
pages
=
"489--501",
year
=
"1998",
}