00641naa#a2200193#i#450# EN\\bibl\92083 20250811144937.1 3034-4689 20250801b2025####ek#y0engy0150####ca RU EFFECT OF CARBONATE ADDITIVES CA AND MG ON CHANGES IN COMPOSITION AND PROPERTIES OF HEAVY OIL IN THE PROCESS OF LOW-TEMPERATURE CRACKING Journal article Kazan Kazan National Research Technological University 2025 5 с. Journal article local Antonova Marina Yur'evna Davletshin A R Telyashev R G vestniktu.ru