On mixed LCA groups with commutative rings of continuous endomorphisms. V. Popa, Buletinul Academiei de ştiinţe a Republicii Moldova, Matematica, 2007, v. 3(55), p.73-90.
On torsionfree LCA groups with commutative rings of continuous endomorphisms. V. Popa, Buletinul Academiei de ştiinţe a Republicii Moldova, Matematica, 2007, v. 2(54), p.81-100.
On LCA groups in which some closed subgroups have commutative rings of continuous endomorphisms. V. Popa, Buletinul Academiei de ştiinţe a Republicii Moldova, Matematica, 2007, v. 1(53), p.83-94.
On topological torsion LCA groups with commutative ring of continuous endomorphisms. V. Popa, Buletinul Academiei de ştiinţe a Republicii Moldova, Matematica, 2006, v. 3(52), p.29-42.
On LCA groups with compact rings of continuous endomorphisms V. Popa, Buletinul Academiei de ştiinţe a Republicii Moldova, Matematica, 2000, 1(32), 17-32.
On the connected component of a homomorphism group V. Popa, Mathematica, Editions de l’Academie Roumaine, Cluj-Napoca, 1999, Tome 41(64), nr. 1, 69-83.
On endomorphism rings without nonzero nilpotent elements. II V. Popa, Buletinul Academiei de ştiinţe a Republicii Moldova, Matematica, 1999, 2(30), 91-104.
On endomorphism rings without nonzero nilpotent elements. I V. Popa, Buletinul Academiei de ştiinţe a Republicii Moldova, Matematica, 1998, 3(28), 35-48.
Membership in Societies and Editorial Boards
Member of the Mathematical Society of the Republic of Moldova.
Publications in Computer Science Journal of Moldova, Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica and Quasigroups and Related Systems