@article {,
	title = {An approximate secular equation of Rayleigh waves propagating in an orthotropic elastic half-space coated by a thin orthotropic elastic layer},
	journal = {Wave motion},
	volume = {49},
	year = {2012},
	pages = {681-689},
	author = {Vinh, Pham Chi and Linh, Nguyen Thi Khanh}
}
