“Biostratigraphical Investigation of Middle-Early Miocene Sediments from a Section of AK-1 Well, Onshore Niger Delta: Insights from Calcareous Nanofossils”. Fountain Journal of Natural and Applied Sciences 12, no. 1 (June 30, 2023). Accessed April 2, 2026. http://www.fountainjournals.com/index.php/FUJNAS/article/view/439.