U.U. Gabriel , P.E. Anyanwu and A.O. Akinrotimi
Z. Branes , M. Ounissi , D. Sargos and C. Amblard
Adetola Jenyo-Oni
J.G. Michel-Parra , J.R. Orozco Hernandez , I.J. Ruiz Garcia and O.D. Montanes Valdez
L.L.C. Ugwu , P.J. Kwaji and B.O. Mgbenka
T.D. Sink and R.T. Lochmann
B.O. Mgbenka , H.O. Nwamba and L.L.C. Ugwu
T.A. Abii , O.E. Afieroho and F.U. Nnamdi
B.N. Ejidike and F.E. Okosodo
L.L.C. Ugwu , B.O. Mgbenka , B.S. Valdon and C.D. Nwani
R.G. Oldfield
Magdy M. Gaber
N.K. Owhonda , O.A. Akinrotimi , E.J. Ansa , O.M. Edun , P.E. Anyanwu , J.Y. Opara and D.O. Onunkwo