@ARTICLE{
author={Premovic Pavle I,Allard T,Nikolic Nikola D,Tonsa IR,Pavlovic Mirjana S},
year={2000},
title={Estimation of vanadyl porphyrin concentration in sedimentary kerogens and asphaltenes},
journal={FUEL},
volume={79},
number={7},
pages={813-819},
document_type={Article},
}