Ubaidullaev J.N., Vakhin A.V., Katnov V.E., Trubistina S.A., Mukhamadiev N.K. Assessments of Chemical Composition and Properties High-Viscosity Oil Based on Elemental. CAJMNS [Internet]. 2023Oct.1 [cited 2025Oct.26];4(5):332-9. Available from: https://cajmns.casjournal.org/index.php/CAJMNS/article/view/1826