Braun, T., J. Neuberg, and M. Ripepe. “On the Origin of the Long-Period Tremor Recorded at Stromboli Volcano (Italy)”. Annals of Geophysics 39, no. 2 (November 25, 1996). Accessed April 26, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3977.