Korobiichuk, V., Kravets, V., Sobolevskyi, R., Han, A., & Vapnichna, V. (2018). Weakening of rock strength under the action of cyclic dynamic loads. Eastern-European Journal of Enterprise Technologies, 2(5 (92), 20–25. https://doi.org/10.15587/1729-4061.2018.127847