by Obot, Nsikan I., Humphrey, Ibifubara, Chendo, Michael A. C., Udo, Sunday O.
Published in Beni-Suef University Journal of Basic and Applied Sciences (21.12.2019)

by Agbor, Mfongang Erim, Udo, Sunday O., Ewona, Igwe O., Nwokolo, Samuel Chukwujindu, Ogbulezie, Julie C., Amadi, Solomon Okechukwu
Published in Cleaner Engineering and Technology (01.04.2023)

by UDO, Sunday O, AKPABIO, Louis E, ETUK, Sunday E
Published in Turkish journal of physics (2004)

by UDO, Sunday O, AKPABIO, Louis E, ETUK, Sunday E
Published in Turkish journal of physics (2005)

by Amadi, Solomon O., Agbor, Mfongang E., Udo, Sunday O.
Published in International journal of sustainable development and planning (28.02.2021)

by Ewona, I O, Udo, Sunday O
Published in Global journal of pure and applied sciences (01.01.2011)

by Umoh Sunday OUdo, Mfon David, Udoakah, Ye-Obong N
Published in Journal of Asian scientific research (Online) (01.11.2013)