TY - JOUR AU - Natalia Neagu AU - Victor Orlov AU - Mihail Popa TI - Invariant conditions of stability of unperturbed motion governed by some differential systems in the plane JO - Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica PY - 2017 SP - 88 EP - 106 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/BASM_2017_3_a6/ LA - en ID - BASM_2017_3_a6 ER -