E. Ogbeh, E. G. Casmir, A. N. Abdulmumin, E. A. Stephen, and R. A. I. Ogunkemi, “Extraction and Characterization of Cola Millenii K. Schum (Monkey Cola) Seed Oil: Optimization Using Full Factorial Design of Experiment”, NIJOPHASR, vol. 7, no. 2, pp. 1–6, May 2018.