Singtuen, Vimoltip, and Thitaree Junjuer. “Characterisation of Potholes Formed on Bedrock Sandstones at Loei Dun, Phetchabun Geopark, Thailand”. Geologos, vol. 28, no. 1, May 2022, pp. 39-50, doi:10.2478/logos-2022-0003.