Obi, Ifeanyichukwu S., K. Mosto Onuoha, Olusegun T. Obilaja, and C. I. Princeton Dim. 2020. “Understanding Reservoir Heterogeneity Using Variography and Data Analysis: An Example from Coastal Swamp Deposits, Niger Delta Basin (Nigeria)”. Geologos 26 (3):207-18. https://doi.org/10.2478/logos-2020-0020.