المؤلفون: Agoha, C. C.^{Aff1, IDs12145024014647_cor1}, Opara, A. I., Bartholomew, D. C., Osaki, L. J., Agoha, U. K., Njoku, J. O., Akiang, F. B., Epuerie, E. T., Ibe, O. C.

المصدر: Earth Science Informatics. :1-28

المؤلفون: Akakuru, O. C.^{Aff1, IDs13762023053010_cor1}, Opara, A. I., Aigbadon, G. O., Usman, A., Ibeneme, S. I., Iheme, K. O., Njoku, A. O., Akudinobi, B. E. B.

المصدر: International Journal of Environmental Science and Technology. 21(4):4527-4546

المؤلفون: Opara, A. I., Ireaja, A. N., Eyankware, M. O.^{Aff2, Aff3, IDs42108023002512_cor3}, Urom, O. O., Ikoro, D. O., Akakuru, O. C., Dioha, E., Omoko, N. E.

المصدر: International Journal of Energy and Water Resources. :1-33

المؤلفون: Opara, A. I., Edward, O.-O. I., Eyankware, M. O.^{Aff2, Aff3, IDs13762022044851_cor3}, Akakuru, O. C., Oli, I. C., Udeh, H. M.

المصدر: International Journal of Environmental Science and Technology. 20(8):8975-9000

المؤلفون: Emberga, T. T.^{Aff1, IDs42108023002441_cor1}, Opara, A. I., Onyekuru, S. O., Omenikolo, A. I., Bilar, A. A., Unegbu, C. C., Anuforo, D. N., Epuerie, T. E.

المصدر: International Journal of Energy and Water Resources. :1-19

المؤلفون: Fagorite, V. I.^{Aff1, IDs13762022043510_cor1}, Onyekuru, S. O.^{Aff1, Aff2}, Opara, A. I.^{Aff1, Aff2}, Oguzie, E. E.^{Aff1, Aff3}

المصدر: International Journal of Environmental Science and Technology. 20(4):4585-4614

المؤلفون: Fagorite, Victor I.^{Aff1, IDs41207022003280_cor1}, Chijioke, Chinonye F.^{Aff1, Aff3}, Opara, Alexander I.^{Aff1, Aff2}, Onyekuru, Samuel O.^{Aff1, Aff2}, Oguzie, Emeka E.^{Aff1, Aff3}

المصدر: Euro-Mediterranean Journal for Environmental Integration. 7(3):445-461

المؤلفون: Akakuru, O. C.^{Aff1, IDs42108021001620_cor1}, Eze, C. U., Okeke, O. C., Opara, A. I., Usman, A. O., Iheme, O., Ibeneme, S. I., Iwuoha, P. O.

المصدر: International Journal of Energy and Water Resources. 6(3):389-411

المؤلفون: Urom, O. O.^{Aff1, IDs42108021001228_cor1}, Opara, A. I., Usen, O. S., Akiang, F. B., Isreal, H. O., Ibezim, J. O., Akakuru, O. C.

المصدر: International Journal of Energy and Water Resources. 6(1):15-36

المؤلفون: Oli, I. C.^{Aff1, IDs1066102210341z_cor1}, Opara, A. I., Okeke, O. C., Akaolisa, C. Z., Akakuru, O. C., Osi-Okeke, I., Udeh, H. M.

المصدر: Environmental Monitoring and Assessment: An International Journal Devoted to Progress in the Use of Monitoring Data in Assessing Environmental Risks to Humans and the Environment. 194(10)