Vinh PC, Anh VTN. An approximate secular equation of Rayleigh waves in an elastic half-space coated by a thin weakly inhomogeneous elastic layer. Vietnam J. Mech. [Internet]. 2015 Feb. 26 [cited 2024 Apr. 25];37(1):71-80. Available from: https://vjs.ac.vn/index.php/vjmech/article/view/5900