A. Selvadurai, K. Willner, and L. Gaul, “On frictionally constrained wing-cracks”, Arch. Mech., vol. 57, no. 2-3, pp. 189–207, May 2005, Accessed: Dec. 21, 2025. [Online]. Available: https://am.ippt.pan.pl/index.php/am/article/view/v57p189