00507oas 2200181z- 450 9964845716033162789-5734(DE-599)ZDB3149105-4(CKB)5710000000026596(EXLCZ)99571000000002659620230306cuuuuuuuu -u- -engElectronic Journal of MathematicsPakistanShahin Digital PublisherJOURNAL996484571603316Electronic Journal of Mathematics2906593UNISA