Artigo · Revista · 2019
A. M. Ette, J. U. Chukwuchekwa, Itoro U. Udoakpan, W. I. Osuji
Journal of Advances in Mathematics and Computer Science
Lê-lo10.9734/jamcs/2019/v30i630091
tal como impresso: I. U. Udo–Akpan