O'Regan, Donal, Department Of Mathematics, National University of Ireland, Galway, Ireland.
Oboyi, J., University of Calabar
Odibo, S.E.
Ofem, A. E., University of KwaZulu-Natal
Ofem, A. E., University of KwaZulu-Natal
Ofem, Austine E.
Ogbonna, R. C., Evangel University, Akaeze, Ebonyi State, Nigeria
Okeke, C.C., School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, Durban, South Africa.
Okeke, G. A., Department of Mathematics, University of Lagos, Nigeria.
Okpala, M. E., Federal University Ndufu Alike Ikwo, Abakaliki Ebonyi State.
Okpala, M.E., African University of Science and Technology ABuja
Olaleru, J. O., University of Lagos
Olaleru, Johnson O.
Olaleru, Johnson Olajire, University of Lagos
Olaoluwa, Hallowed, Department of Mathematics, University of Lagos.
Olatinwo, M. O.
Omran, Saleh, Department of Mathematics, Faculty of Science, South Valley University
Orim, R. E., University of Calabar, Nigeria
Orim, R. E., University of Calabar
Osilike, M.O.
Osisiogu, U. A., Ebonyi State University, Abakaliki
Otafudu, Olivier Olela
Otubo, Emmanuel E., African University of Science and Technology, Abuja; Ebonyi State University
Otubo, Emmanuel E.
Oulabes, Mouad, Laboratory of Mathematics, Computer Science and Applications, Hassan II University of Casablanca.

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