CAPUTO, M.; POSTPISCHL, D. Contour mapping of seismic areas by numerical filtering and geological implications. Annals of Geophysics, [S. l.], v. 27, n. 3-4, p. 619–639, 1974. DOI: 10.4401/ag-4939. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4939. Acesso em: 23 may. 2022.