TY JOUR TI SURFACTANTS INCREASING OIL RECOVERY FROM DEPOSITS OF HIGH-VISCOSITY OILS KW HIGH-VISCOSITY OILS KW STEAM-THERMAL EFFECT KW OIL DISPERSED SYSTEM KW PHASE TRANSITIONS KW ASPHALTENES KW COMPLEX STRUCTURAL UNIT KW SARA KW IR SPECTROSCOPY KW GAS CHROMATOGRAPHY JO Herald of Technological University AU Antonova, M.Y. AU Gaffanova, R.I. AU Davletshin, A.R. AU Telyashev, R.G. PY 2025 IS 27 PB Kazan National Research Technological University