Authors
Vasile Berinde
Academy of Romanian Scientists and Department of Mathematics and Computer Science, Technical University of Cluj-Napoca, North University Centre at Baia Mare, Romania
Mădălina Păcurar
madalina.pacurar@econ.ubbcluj.ro
Department of Economics and Business Administration in German Language, Faculty of Economics and Business Administration, Babeş-Bolyai University of Cluj-Napoca, Cluj-Napoca, Romania