1. Universiti Teknologi Malaysia,Centre of Electrical Energy System School of Electrical Engineering,Skudai,Malaysia,81310
2. Universiti Teknologi Malaysia,Centre of Electrical Energy System Faculty of Electrical Engineering,Skudai,Malaysia,81310
3. Islamic University of Madinah,Faculty of Engineering,Department of Electrical Engineering,Madinah,Saudi Arabia,42351
4. University of Maiduguri,Faculty of Engineering,Department of Electrical Engneering,Maiduguri,Nigeriaia,1069