Nguyen , V. S., Nguyen , T. T., Mai , H. D., Pham , T. D. and Nguyen , T. T. (2026) “Biostratigraphy and depositional environments of the Late Oligocene - Early Miocene in the southeastern Nam Con Son basin ”, Petrovietnam Journal, 10, pp. 32 - 43. doi: 10.47800/PVSI.2026.01-03.