1. Babichev, D.A.: Development and approbation of the number of qualitative parameters for synthesis of spur and helical gears. Ph.D. Thesis (in Russian) (2013)
2. Babichev, D.A., Serebrennikov, A.A., Babichev, D.T.: Qualitative indexes of planar gearing operation. In: Proceedings of the 7th International Conference on Research and Development of Mechanical Elements and Systems, Zlatibor, Serbia, pp. 623–630 (2011)
3. Babichev, D.T.: Issues of investigation of geometry and kinematics of gearing. Ph.D. Thesis, Sverdlovsk, UPI (in Russian) (1971)
4. Babichev, D.T.: On basic geometrical primitives of the theory of gearing. In: Proceedings of the International Conference on Theory and Practice of Gearing, Izhevsk, pp. 469–474 (in Russian) (1996)
5. Babichev, D.T.: Basic rack surface of edge tools. In: Proceedings of the International Conference on Theory and Practice of Gearing, Izhevsk, pp. 412–421 (1998)