BOSCHI, E., and F. MULARGIA. “Nucleation and Initial Propagation of Shear Cracks”. Annals of Geophysics 30, no. 1-2 (November 25, 1977): 201–204. Accessed September 26, 2022. https://www.annalsofgeophysics.eu/index.php/annals/article/view/4818.