Vinh, Pham Chi, Tran Thanh Tuan, and Le Thi Hue. 2017. “Approximate Formula for the H/V Ratio of Rayleigh Waves in Incompressible Orthotropic Half-Spaces Coated by a Thin Elastic Layer”. Vietnam Journal of Mechanics 39 (4). Hanoi, Vietnam:365-74. https://doi.org/10.15625/0866-7136/10033.