TY JOUR TI EFFECT OF METAL OXIDE COAL ADDITIVES ON CRACKING OF EXTRA-VISCOUS OIL IN SUBCRITICAL AQUEOUS FLUID KW EXTRA-VISCOUS OIL KW LOW-TEMPERATURE CRACKING KW COAL ADDITIVE KW ASPHALTENES KW SARA ANALYSIS KW DEGREE OF TRANSFORMATION KW METAL OXIDE CATALYSTS JO Herald of Technological University AU Zayceva, E.G. AU Antonova, M.Y. AU , .. AU Davletshin, A.R. AU , .. PY 2025 IS 28 PB Kazan National Research Technological University