Чигур, Л. Я., and Ю. Б. Долішня. “JUSTIFICATION OF DECISIONS ON A LOGICAL END POINT OF FLIGHT PDC BIT”. Oil and Gas Power Engineering, no. 2(13) (December 2, 2010): 12–14. Accessed April 28, 2024. https://nge.nung.edu.ua/index.php/nge/article/view/250.