BOSTAN, V., BOSTAN, I. and VACULENCO, M. 2021. Mathematical modeling of the multipair convex-concave teeth contact in precessional gearing. Acta et Commentationes Exact and Natural Sciences. 10, 2 (Jan. 2021), 17-27. DOI:https://doi.org/10.36120/2587-3644.v10i2.17-27.