B. Parsa MoghaddamUniversity of LahijanPotvrđena adresa e-pošte na liau.ac.ir
K. IvazProfessor of Applied Mathematics, University of TabrizPotvrđena adresa e-pošte na tabrizu.ac.ir
J. Tenreiro MachadoInstitute of Engineering, Polytechnic of Porto, Dept. of Electrical Engineering, Porto, PortugalPotvrđena adresa e-pošte na isep.ipp.pt