Volume 12, Issue 2, May and June 2015, Pages 93-100
10.22038/ijmp.2015.4772
Esen Nsikan U; Obed, R. I
Volume 9, Issue 4, November and December 2012, Pages 245-251
10.22038/ijmp.2013.467
Nsikan U. Esen; Rachel. I. Obed