G. Caviglia and A. Morro, “Existence and uniqueness of the solution in the frequency domain for the reflection-transmission problem in a viscoelastic layer”, Arch. Mech., vol. 56, no. 1, pp. 59–82, Jan. 2004, Accessed: Nov. 19, 2025. [Online]. Available: https://am.ippt.pan.pl/index.php/am/article/view/v56p59