W. Lienhart. “State-of-the Art of Geotechnical Monitoring with Geodetic Techniques”. Geotechnical Engineering Journal of the SEAGS & AGSSEA 50, no. 2 (June 30, 2019): 13–20. accessed September 12, 2026. https://ph01.tci-thaijo.org/index.php/SEAGS_AGSSEA_Journal/article/view/258991.