TY - CPAPER AU - Dmitry Milordov TI - CONTENT AND TYPES OF VANADYL PORPHYRINS IN ASPHALTENES AND RESINS OF HEAVY OILS FROM VARIOUS PRODUCTIVE COMPLEXES T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining PY - 2017 SP - 109 EP - 116 DO - 10.5593/sgem2017/11/s01.014 PB - STEF92 Technology ER -