В. А. Василенко. "CAD/CAE ANALYSIS OF SPRING CONICAL SPACER WORK." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 19th International Multidisciplinary Scientific GeoConference SGEM2019, Informatics, Geoinformatics and Remote Sensing, 2019, pp. 137-144. https://doi.org/10.5593/sgem2019/2.1/s07.018