E.O. Odebunmi and O.O. Dosumu
Khalid A. Hassan , Amro B. Hassan , Mohamed M. Eltayeb , Mashier A. Sulieman , Gamaa A. Mohamed and Elfadil E. Babike
Khalid A. Hassan , Amro B. Hassan , Mohamed M. Eltayeb Gammaa , A. Osman , Nafisa M. ElHassan and Elfadil E. Babiker
O.B. Ocheme
Nidal A. Zatar
O.J. Egbere , J.C. Anuonye , P.F. Chollom and P.V. Okpara
T.A. Abii and Elegalam Amarachi
M. Christopoulou-Gerogiannaki , I. Gerogiannaki , E. Anagnostartas , D.E. Stavrakas and M. Polissiou
Evelyn N. Bede and Chinenye U. Chigbu
Hesham A. Eissa , B.E. Mostafa and A.S. Hussein
C.E. Chinma and D.I. Gernah
G.I. Onwuka and N.J. Ogbogu
M.M. Conceicao , J.C.O. Santos , P.A. Filgueiras , R.O. Macedo , V.J. Fernandes and A.G. Souza
M.O. Oluwamukomi , I.A. Adeyemi and O.O. Odeyemi