O, Alonge, Universiti Utara Malaysia (Malaysia)
O, Omoboriowo A, Department of Geology, University of Port Harcourt, Nigeria (Nigeria)
O. Alghannam, Abdul Rahman, Head of Department of Agricultural Systems Engineering (Saudi Arabia)
O. Y. Marpaung, Beny
O.K. Rakmat, Riza Atiq
Obaid Alhefeiti, Hamdan Sohail, Universiti Tun Hussein Onn Malaysia (UTHM) (United Arab Emirates)
Obeng, Frank, Business School , Takoradi Polytechnic (Ghana)
Obisesan, Ololade Elizabeth, Department of Management and Accounting, Obafemi Awolowo University, Ile Ife, Osun State, Nigeria. (Nigeria)
Oborah, James Omatule, Federal Polytechnic, Idah, Kogi State, Nigeria (Nigeria)
Octavia, Ade
Octavia, Tanti (Indonesia)
Ode, Christian Agbatchi, University of Parakou, Republic Benin (Benin)
Oduro, Francis Tabi, Senior Lecturer, Mathematics Department (Ghana)
Ogalo, Habil Slade, Arab Open University, Bahrain
Ogunribido, Tolulope Thompson, MNMGS, MTRC (Nigeria)
Ogunwolu, Ladi, University of Lagos, Nigeria. (Nigeria)
Ohmori, Shunichi, Waseda University (Japan)
Ojah, Hassnain Kadhim
Ojubanire, Olugbenga Ayo, Obafemi Awolowo University (Morocco)
Okafor, Emeka Christian, Department of Industrial and Production Engineering, Nnamdi Azikiwe University Awka, Nigeria (Nigeria)
Okafor, N.A., Department of Petroleum and Gas Engineering, University of Port Harcourt, Rivers State (Nigeria)
Okagbue, Hilary I, Department of Mathematics, Covenant University, Ota, Nigeria
Okano, Marcelo T
Okano, Marcelo T (Brazil)
Okate, Samuel I

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