Cvetanov, Genadi, and Tsanko Karadzhov. “CONSEQUENCES OF THE BASIC LAW OF FLAT INTERLOCKING OF INVOLUTE CYLINDRICAL GEARS”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, vol. 3, June 2021, pp. 54-57, https://doi.org/10.17770/etr2021vol3.6576.