1. Department of Mathematics Qaemshahr Branch , Islamic Azad University Qaemshahr , Qaemshahr , Iran
2. Department of Mathematics Babol Branch , Islamic Azad University Babol , Babol , Iran
3. Faculty of Technology Bulevar cara Lazara 1 University of Novi Sad , Novi Sad , Serbia
4. Nonlinear Analysis Research Group Ton Duc Thang University , Ho Chi Minh City , Vietnam
5. Department of Mathematics and Statistics , Ton Duc Thang University , Ho Chi Minh City , Vietnam