“Collapse Potential and Ultrasonic Pulse Velocity of Loess Soils After Treatment With Expanded Perlite and Metakaolin”. Acta Polytechnica CTU Proceedings 45 (December 14, 2023): 45–52. Accessed March 29, 2025. https://ojs.cvut.cz/ojs/index.php/APP/article/view/9551.