1. Berezhnoi, S.B., Ostapenko, O.I., Voina, A.A., Puntus, A.V., 1998. Method of manufacturing involute sprockets. RUS Patent, 2110374.
2. Involute chain transmission sprocket;Berezhnoi;Vestnik of Don State Technical University,2013
3. DIN 3972-1952. Reference Profiles of Gear-cutting Tools for Involute Tooth Systems according to DIN 867.
4. DIN 867-1986. Basic rack tooth profiles for involute teeth of cylindrical gears for general engineering and heavy engineering.
5. DIN8187. Roller chains.