hat
2. Baikhelt, F., &amp; Franken, P. (1988). Nadezhnost y tekhnycheskoe obsluzhyvanye. Matematycheskyi pokhod. M.: Radyo y sviaz.
eng
8. Savenko, I. I., &amp; Neustroiev, I. H. (2016, January). Retsyklinh: Vyznachennia ta mezhi vykorystannia. Retrieved from http://readera.org/article/retsyeklinh-vyeznachennja-ta-mezhi-vyekoryestannja-10176133.html.