1. Department of Electrical and Electronics Engineering, College of Technology (COT), University of Buea, Buea P.O. Box 63, Cameroon
2. Department of Electrical and Power Engineering, Higher Technical Teacher Training College (HTTTC), University of Bamenda, Bambili P.O. Box 39, Cameroon
3. Department of Electrical and Electronics Engineering, College of Technology, University of Bamenda, Bambili P.O. Box 39, Cameroon