1. Inventor's Certificate 584578 USSR / P.A. Vityaz, S.M. Usherenko, V.Ya. Fure, and Yu.A. Kovalevich, Method of Bulk Doping of Parts, in Bull. Izobret, No. 18 (1975) (in Russian).
2. Inventor's Certificate 703585 USSR / S.M. Usherenko, I.I. Fetisov, and G.G. Zagorskii, Method of Tool Production, in Bull. Izobret, No. 46 (1979) (in Russian).
3. Interaction of Particle Flow with Target Material, Hearings of Section “Synthesis of New Materials by Dynamic Methods”, Minsk, 1987, Institute of Mechanics and Machine Reliability AN BSSR, Minsk, 1987 (in Russian).
4. Mechanism of abnormally low resistance at motion of bodies in solid media;Cherny;DAN SSSR,1987
5. On the nature of “superdeep” penetration of solid microparticles into hard materials;Grigoryan;DAN SSSR,1987