@article{_urka_2005,
title={Natural bitumens versus oil pollution in the Vlasina lake peat},
volume={3},
ISSN={1610-3661},
url={http://dx.doi.org/10.1007/s10311-005-0110-2},
DOI={10.1007/s10311-005-0110-2},
number={1},
journal={Environmental Chemistry Letters},
publisher={Springer Science and Business Media LLC},
author={Đurka,
D. and Pfendt,
P. and Jovančićević,
B. and Cvetković,
O. and Wehner,
H.},
year={2005},
month=jun,
pages={39–42} }