P. Chi Vinh and R. Ogden, “Formulas for the Rayleigh wave speed in orthotropic elastic solids”, Arch. Mech., vol. 56, no. 3, pp. 247–265, May 2004, Accessed: Nov. 19, 2025. [Online]. Available: https://am.ippt.pan.pl/index.php/am/article/view/v56p247