Muneer A. Suwaid (2019). UPGRADING OF TATARSTAN HEAVY CRUDE OIL USING COFe2O4-NANOPARTICLES CATALYST AT 300oC. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings19th, Science and Technologies in Geology, Exploration And Mining, 1149-1154. https://doi.org/10.5593/sgem2019/1.2/s06.146