C.S. Ikpeazu and E.C. Obinabo
A. Zeblah , E. Chatelet , M. Samrout and H. Hamdaoui
A.O. Osahenvemwen and O. Omorogiuwa
H. Haroonabadi and M.R. Haghifam
S. Ramesh and A. Krishnan
M.J.E. Evbogbai , F.E. Ogieva and A.O. Osahenvemwen
A.U. Adoghe , I.A. Odigwe and S.O. Igbinovia
Sung-Ling Chen , Ming-Tong Tsay and Hong-Jey Gow
M. Sushama and G. Tulasi Ram Das
A. Vetrivel , N. Malmurugan and Jovitha Jerome
Saleh A. Al-Jufout and Emad S. Addasi