Orazayeva, Ainur, L.N. Gumilyov Eurasian National University (Kazakhstan)
Orenyi, Bajeh Amos, Landmark University (Nigeria)
Orimogunje, Abidemi, Covenant University (Nigeria)
Orovwode, Hope, Covenant University (Nigeria)
Orovwode, Hope Evwieroghene, Covenant University (Nigeria)
Orozco, Álvaro A., Universidad Tecnológica de Pereira (UTP) (Colombia)
Orozco, Joaquin F, Universidad Nacional de Colombia - Sede Medellín - Facultad de Ciencias (Colombia)
Orpa, Refat Tasfia, Hajee Mohammad Danesh Science and Technology University (Bangladesh)
Ortecho, Leonardo Ledesma, Universidad Tecnologica del Perú (Peru)
Ortega, Jairo Cuero, Universidad de los Llanos (Colombia)
Ortega-Gonzalez, Lilia, Universidad de la Costa (Colombia)
Ortjohann, Egon, South Westphalia University of Applied Sciences Soest, Germany (Germany)
Orynbayeva, Ainur, Astana Medical University (Kazakhstan)
Osaghae, Etinosa Noma, Covenant University (Nigeria)
Osama, Amira, High Institutes for Engineering and Technology Al-obour (Egypt)

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