Bu, Bo, Huayu Shang, Shaoping Liu, and Ke Liu. “Rapid Evaluation Method of Subgrade Performance Using Portable Falling Weight Deflectometer”. Archives of Civil Engineering 69, no. 4 (December 30, 2023): 619–633. Accessed October 19, 2026. https://wydawnictwo.pan.pl/index.php/ace/article/view/4201.