@article{Pilawa:2009,
author
=
"B.Pilawa and A.Więckowski and B.Trzebicka",
title
=
"Two component structure of the EPR spectra of coal and its macerals",
journal
=
"Erdöl und Kohle Erdgas Petrochemie - Hydrocarbon Technology",
volume
=
"Jahrg. 43",
number
=
"H. 5",
pages
=
"187--189",
year
=
"1990",
}