Advances in Mathematics: Scientific Journal

2018, Vol. 7, No. 2

Neslihan Uyanik and Shigeyoshi Owa
Berhanu Assaye Alaba, Gezahagne Mulat Addis and Wondwosen Zemene Norahun
O. Odetunde, J. Lawal, H. O. Edogbanya, and M. O. Ibrahim