S. Noorbakhsh, J. Mousavi, M. Barati, A.R. Shamshiri, M. Shekarabi, A. Tabatabaei and Gh. Soleimani

S.G. Ahmed and J. Uraka

W.M. Al-Saeed 

T.B. Ekanem, I.E. Bassey, O.E. Mesembe, M.A. Eluwa and M.B. Ekong

N.E.E. Elbadawi, M.I. Mohamed, O.Y. Dawod, K.E. Ali, O.H. Daoud, E.M. Ali, E.G.E. Ahmed and A.E. Mohamed

M. Simbar, F. Nahidi, F. Ramezani-Tehrani  and A. Akbarzadeh

J.A. Abdel-Barry, M.S. Flafl, L.M. Al-Namaa and N.A. Hassan

F. Zolala

M. Adib-Hajbaghery

H.K. Nofal, M.F. Abdulmohsen  and A.H.Khamis 

J.A Razzak, U.R. Khan, I. Azam, M. Nasrullah, O. Pasha, M. Malik  and A. Ghaffar 

U. Farooq, J.A. Bhatti, M. Siddiq, M. Majeed, N. Malik, J.A. Razzak and M.M. Khan

S. Bonakdaran, S. Ebrahimzadeh and S.H. Noghabi

Professor Ian Roberts