Harrison Shagwira,Fredrick Madaraka (Dedan Kimathi University of Technology Mwema Kenya),Thomas Ochuku (University of Nairobi Mbuya Kenya.)
（2）
Fredrick Madaraka Mwema,Tien-Chien (University of Johannesburg Jen South Africa),Lin Zhu
（1）
Fredrick Madaraka Mwema,Tien-Chien Jen,Lin Zhu
（1）
Tien-Chien (University of Johannesburg Jen South Africa),Edwell Tafara Mharakurwa,Steven Otieno Otieno,Fredrick Madaraka (Dedan Kimathi University of Technology Mwema Kenya),Job Maveke Wambua
（1）
