D. S. Adepehin, F. F. Magi, O. R. Omokungbe, T. A. Olajide, and A. O. Olajide, “Assessment of Three Non-Linear Approaches of Estimating the Shale Volume Over Yewa Field, Niger Delta, Nigeria ”, USci, vol. 1, no. 1, pp. 20–29, Sep. 2022.