Beysenov, N.K. “Design Optimization of a Hinged Four-Bar Linkage With the Use of Computer Technology”. Bulletin of the Karaganda University. Mathematics Series 80, no. 4 (December 29, 2015): 4–8. Accessed July 10, 2025. https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/54.