Authors
Roberta Bucur
Department of Mathematics, University of Piteşti, Târgul din Vale St., No.1, 110040, Piteşti, Romania
Loriana Andrei
Department of Mathematics and Computer Science, University of Oradea, 1 Universitatii St., 410087, Oradea, Romania
Daniel Breaz
Department of Mathematics, “1 Decembrie 1918” University of Alba Iulia, N. Iorga St., No. 11-13, 510009, Alba Iulia, Romania