Authors
Cristian Daniel Alecsa
cristian.alecsa@math.ubbcluj.ro
Department of Mathematics, Babeş-Bolyai University, Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy, Cluj-Napoca
Adrian Petruşel
Department of Mathematics, Babeş-Bolyai University, Academy of Romanian Scientists Independenţei Street, Cluj-Napoca
