1. Kudryavtsev, V.N., Zubchatye peredachi (Gear Drives), Moscow-Leningrad: MAShGIZ, 1957.
2. Reshetov, D.N., Detali mashin (Machine Elements), Moscow: Mashinostroenie, 1989.
3. Kogaev, V.P. and Drozdov, Yu.N., Prochnost’ i iznosostoikost’ detalei mashin (Durability and Wear Resistance of Machine Elements), Moscow: Visshaya shkola, 1991.
4. Kragel’skii, I.V., Dobychin, M.N., and Kombalov, V.S., Osnovy raschetov na trenie i iznos (Numerical Basis for Friction and Wear), Moscow: Mashinostroenie, 1977.
5. Yanke, E., Emde, F., and Lesh, F., Spetsial’nye funktsii (Special Functions), Moscow: Nauka, 1977.