menzel, h. “SULLO SPETTRO DELLE ONDE SISMICHE DESTATE DA ESPLOSIONI (*)”. Annals of Geophysics 4, no. 3 (November 25, 1951): 433–448. Accessed December 2, 2021. https://www.annalsofgeophysics.eu/index.php/annals/article/view/5924.