Kanlybaev Оразалы, Satkalieva Марфуга, and Galimov Ержан. 2023. “Problems of Closure of Spatial Lever Mechanisms With Variable Contours”. Рroblems of Engineering and Professional Education 10 (1):25-33. https://doi.org/10.32523/2220-685X-2012-10-1-25-33.