NEAGU, N. and ORLOV, V. 2018. CENTER-AFFINE INVARIANT CONDITIONS OF STABILITY OF UNPERTURBED MOTION FOR DIFFERENTIAL SYSTEM s(1, 2, 3) WITH QUADRATIC PART OF DARBOUX TYPE. Acta et Commentationes Exact and Natural Sciences. 6, 2 (Dec. 2018), 51-59. DOI:https://doi.org/10.36120/2587-3644.v6i2.51-59.