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2. K. Arnaudov, D. Karaivanov, Planetary Gear trains, Sofia, Bulgaria,Publishing house of BAS “Prof. Marin Drinov”, 2017 (in Bulgarian).
3. Kudryavtsev, Y. Kirdyashev. Planetary Gear Trains, Leningrad,Mashinostroenie, 1977 (in Russian).
4. H. W. Muller, Epicyclic Drive Trains. Detroit, MI: Wayne State University Press, 1982.
5. D. T. Jelaska, Gears and gear drives, John Wiley & Sons Ltd, 2012 (English), https://doi.org/10.1002/9781118392393