Foti, S., R. Lancellotta, L. Sambuelli, and L. V. Socco. “Notes on Fk Analysis of Surface Waves”. Annals of Geophysics 43, no. 6 (December 25, 2000). Accessed July 14, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3683.