INVESTIGATION OF PUMP-EJECTOR SYSTEMS CHARACTERISTICS FOR WATER ALTERNATING GAS INJECTION Статья Drozdov A.N., Karabaev S.D., Olmaskhanov N.Р., Gorbyleva Y.A., Narozhnyy I.M., Gorelkina E.I. Advances in Raw Material Industries for Sustainable Development Goals. CRC Press/Balkema. 2021. С. 358-367