Alassaf, Y., A. Mabrouk, M. Jamei, and A. Ahmed. “A Failure Criterion of Weak and Crushable Limestone Rock in Mining Field Containing Karstic Cavities”. Engineering, Technology & Applied Science Research, vol. 14, no. 3, June 2024, pp. 14692-7, doi:10.48084/etasr.7295.