@article{Pilawa:2009,
author
=
"B.Pilawa and A.Więckowski and M.Lewandowski and G.Nassalski",
title
=
"Electron paramagnetic resonance studies of coal macerals : Influence of microwave frequency and thermal decomposition",
journal
=
"Erdöl Erdgas Kohle",
volume
=
"Jahrg. 114",
number
=
"H. 1",
pages
=
"37--40",
year
=
"1998",
}