Тарас, І. П., and Т. О. Пригоровська. 2020. “Study on Geometric Features of Conical Threads”. Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas, no. 1(48) (July):16-22. https://doi.org/10.31471/1993-9965-2020-1(48)-16-22.