NEAGU, Natalia, and Victor ORLOV. 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), 51-59. https://doi.org/10.36120/2587-3644.v6i2.51-59.