Ndougsa–Mbarga, T., Manguelle–Dicoum, E., Campos-Enríquez, J.-O., & Yene Atangana, Q. (2007). Gravity anomalies, sub-surface structure and oil and gas migration in the Mamfe, Cameroon-Nigeria, sedimentary basin. Geofísica Internacional, 46(2), 129–139. https://doi.org/10.22201/igeof.00167169p.2007.46.2.22