Singh, Shri Krishna; Astiz, Luciana (1981). "Seismic gaps and recurrence periods of large earthquakes along the Mexican subduction zone: A reexamination". Bulletin of the Seismological Society of America. 71 (3): 827. Bibcode:1981BuSSA..71..827S. doi:10.1785/BSSA0710030827.
Reyes, A.; Brune, J. N.; Lomnitz, C. (1979). "Source mechanism and aftershock study of the Colima, Mexico earthquake of January 30, 1973". Bulletin of the Seismological Society of America. 69 (6): 1819–1840. Bibcode:1979BuSSA..69.1819R. doi:10.1785/BSSA0690061819.
Singh, Shri Krishna; Astiz, Luciana (1981). "Seismic gaps and recurrence periods of large earthquakes along the Mexican subduction zone: A reexamination". Bulletin of the Seismological Society of America. 71 (3): 827. Bibcode:1981BuSSA..71..827S. doi:10.1785/BSSA0710030827.
Reyes, A.; Brune, J. N.; Lomnitz, C. (1979). "Source mechanism and aftershock study of the Colima, Mexico earthquake of January 30, 1973". Bulletin of the Seismological Society of America. 69 (6): 1819–1840. Bibcode:1979BuSSA..69.1819R. doi:10.1785/BSSA0690061819.