Lengerov, Angel, Silviya Salapateva, and Georgi Levicharov. 2024. “IMPROVEMENT OF TECHNOLOGICAL PROCESSES TO REDUCE TOTAL INACCURACY DURING BORING DEEP HOLES”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June): 158-61. https://doi.org/10.17770/etr2024vol3.8127.