Bengt H. Fellenius. “Analysis of Results of an Instrumented Bidirectional-Cell Test”. Geotechnical Engineering Journal of the SEAGS & AGSSEA 46, no. 2 (June 30, 2015): 64–67. accessed April 16, 2025. https://ph01.tci-thaijo.org/index.php/SEAGS_AGSSEA_Journal/article/view/259288.