L. Kruszka, W. Nowacki, and M. Wolna, “Strength and Fracture Analysis of Brittle Photoelastic Material. Static And Dynamic Tests”., Eng. Trans., vol. 40, no. 3, pp. 343–362, Oct. 1992, Accessed: Jun. 12, 2025. [Online]. Available: https://et3.ippt.pan.pl/index.php/et/article/view/1600