Neagu, N., Popa, M. and Orlov, V. 2023. Stability of unperturbed motion governed by the ternary differential system of Lyapunov-Darboux type with nonlinearities of degree four. Acta et Commentationes Exact and Natural Sciences. 14, 2 (Sep. 2023), 57-67. DOI:https://doi.org/10.36120/2587-3644.v14i2.57-67.