Lozanova S, Ralchev M, Roumenin C. New Sensor Technology for Determining Rock Pre-destructive States. C. R. Acad. Bulg. Sci. [Internet]. 2023 Feb. 26 [cited 2023 Mar. 24];76(2):273-81. Available from: https://proceedings.bas.bg/index.php/cr/article/view/258