Abstract
Hoseiniravesh, M; Moghaddam, MRR; Ghouchan, MFD
Moghaddam, MRR (reprint author), Khayyam Univ, Dept Math, 71 Shahid Rafiaee Blvd, Mashhad 7797171719, Iran.; Moghaddam, MRR (reprint author), Ferdowsi Univ Mashhad, CEAAS, Dept Pure Math, POB 7717, Mashhad 77111, Iran.
COMMUNICATIONS IN ALGEBRA, 2018; 46 (9): 3711