@article{BASM_2017_3_a6,
     author = {Natalia Neagu and Victor Orlov and Mihail Popa},
     title = {Invariant conditions of stability of unperturbed motion governed by some differential systems in the plane},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {88--106},
     publisher = {mathdoc},
     number = {3},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2017_3_a6/}
}