Polini, Wilma, and Massimiliano Marziale. “To Model Bolted Parts for Tolerance Analysis Using Variational Model”. International Journal of Engineering and Technology 4, no. 1 (January 14, 2015): 139–148. Accessed February 25, 2026. https://www.sciencepubco.com/index.php/IJET/article/view/3962.