Avirut Puttiwongrak, Pham Huy Giao, and Sakanann Vann. 2020. “AN EASILY USED MATHEMATICAL MODEL OF POROSITY CHANGE WITH DEPTH AND GEOLOGIC TIME IN DEEP SHALE COMPACTION”. GEOMATE Journal 19 (73):108-15. https://geomatejournal.com/geomate/article/view/1781.