Arendarenko, V. M. .; Samoilenko, T. V. .; Antonets, A. V. .; Ivanov, O. M. .; Yaprynets, T. S. .; Flegantov, L. O. . SUBSTANTIATION OF THE FREQUENCY OF GRAINS COLLISIONS IN A FLOW MOVING IN A GRAVITATIONAL INSTALLATION. Scient.Prog.&Innov. 2022, 201-206.