1. Demkin, N.B. and Ryzhov, E.V., Kachestvo poverkhnosti i kontakt detalei mashin (Quality of Surface and Contact of Machine Details), Moscow: Mashinostroenie, 1981.
2. Matlin, M.M., Application of regularities of elasticplastic contact of solids to the solution of applied problems, Probl. Mashinostr. Avtomat., 1991, no. 4, pp. 68–80.
3. Matlin, M.M., Kazankina, E.N., and Kazankin, V.A., Determination of contact harshness of junction of near hardness details, Izvestiya VolgGTU. Ser. “Problemy materialovedeniya, svarki i prochnosti v mashinostroenii”. Vyp. 10, 2014, no. 23, pp. 73–75.
4. GOST (State Standards) 18835: Metals. Plastic Hardness Measurement Method, 1974.
5. Ryzhov, E.V., Kontaktnaya zhestkost’ detalei mashin. (Contact Harshness of Machine Details), Moscow: Mashinostroenie, 1966.