Phonseela, N., T. Assawincharoenkij, and S. Lorchuenwong. “Acid Forming Potential of Black Shale in Ban Pong Basin, Northern Thailand”. Bulletin of Earth Sciences of Thailand, vol. 14, no. 2, Dec. 2022, pp. 166-77, https://ph01.tci-thaijo.org/index.php/bestjournal/article/view/248754.