Surface stress waves in a nonhomogeneous elastic half-space Part II. Existence of surface waves for an arbitrary variation of Poisson’s ratio Approximate solution based on perturbation methods. Arch. Mech. [Internet]. 1996 Jan. 1 [cited 2025 May 14];48(3):513-39. Available from: https://am3.ippt.pan.pl/index.php/am/article/view/v48p513