I. Namdie, I. Akpabio, and A. Okechukwu .E., “Shale volume and permeability of the Miocene unconsolidated turbidite sands of Bonga oil field, Niger delta, Nigeria”, IJAG, vol. 5, no. 1, pp. 37–45, May 2017, doi: 10.14419/ijag.v5i1.7586.