“Surface stress waves in a nonhomogeneous elastic half-space Part I. General results based on spectral analysis Existence and analyticity theorems”, Arch. Mech., vol. 48, no. 3, pp. 493–512, Jan. 1996, Accessed: May 14, 2025. [Online]. Available: https://am3.ippt.pan.pl/index.php/am/article/view/v48p493