Narapan, J. “Different Types of Organic-Rich Geological Markers in South Pailin Field, Pattani Basin, Gulf of Thailand”. Bulletin of Earth Sciences of Thailand, vol. 7, no. 1&2, Nov. 2021, pp. 240-6, https://ph01.tci-thaijo.org/index.php/bestjournal/article/view/246679.