Buczkowski, R., M. Kleiber, and G. Starzynski. “Normal Contact Stiffness of Fractal Rough Surfaces”. Archives of Mechanics 66, no. 6 (November 20, 2014): 411–428. Accessed November 19, 2025. https://am.ippt.pan.pl/index.php/am/article/view/v66p411.