@article{Pilawa:2009,
author
=
"B.Pilawa and B.Trzebicka and A.Więckowski",
title
=
"Coal and its macerals : multi-component structure of the EPR spectra",
journal
=
"Erdöl und Kohle Erdgas Petrochemie - Hydrocarbon Technology",
volume
=
"Jahrg. 45",
number
=
"H. 7/8",
pages
=
"308--312",
year
=
"1992",
}