Author/Authors :
Onar، S نويسنده Department of Mathematics, Y?ld?z Technical University Davutpa?a Kampüsü E Blok 2021 34220 Esenler, Istanbul, Turkey , , Ersoy، B. A نويسنده 1Department of Mathematics, Y?ld?z Technical University Davutpa?a Kampüsü E Blok 2021 34220 Esenler, Istanbul, Turkey , , Tekir، U نويسنده Department of Mathematics, Marmara University, 34722 Istanbul, Turkey ,