by Dirisu Abdul-Rahman, Olomukoro
by E. J. Itumoh, O. P. Aghamelu, T. Izuagie
by Safarpour Marjan, Zazouli M.A., Dobaradaran, Veisi
by Yang Zhong-qing, Ren W.G., Zhang L., Qian C.R., Yan Y.F., Guo M.N.
by Demertzi K., Papamichail D., Aschonitis V., Miliaresis G.
by Hazra Tumpa, Goel S., Maitra B.
by O.M. Awad, S.A. El Fiki, R.A.I. Abou Shanab, N.M.A. Hassanin, Rahman R. Abd El
by Nikolaou Kostas, Basbas
by Samara T., Tsitsoni T.
by Ortega M.F., Rincones M., Elío J., Gutiérrez del Olmo J., Nisi B., Mazadiego L.F., Iglesias L., Vaselli O., Grandia F., García R., De La Vega R., Llamas B.
by C. Couto, I. Pinto, T. Madureira, M.J. Rocha, M.E. Tiritan, J.A. Lopes, Almeida Agostinho A.
by Seeboonruang Uma, Seeboonruang
by Tsanis I.K., Brisette F.
by Bartzokas A., Metaxas D.A., Giles B.D.
by Rouse J., Hirata Osamu, Furukawa Kenji
by Kanellopoulou Helen
by Dimogiannis D.G., Valmis S., Vyrlas P.
by Dąbrowska A., Kasprzyk Hordern B., Nawrocki J.
by Kassomenos P.A.
by Georgiadou E., Kourtidis K., Ziomas I.
by Dermatas D., Menouno N., Dutko P., Dadachov M., Arienti P., Tsaneva V.