M. Ohakwere-Eze, M. Igboekwe, and G. Chukwu, “Petrophysical evaluation and lithology delineation using cross-plots analysis from some onshore wells in the Nigerian-delta, west Africa”, IJAG, vol. 6, no. 1, pp. 99–107, Mar. 2018, doi: 10.14419/ijag.v6i1.9601.