Castro, Raúl R., Luis Munguía, Cecilio J. Rebollar, y José G. Acosta. 1994. «A Comparative Analysis of the Quality Factor Q for the Regions of Guerrero and Oaxaca, México». Geofísica Internacional 33 (3):373-83. https://doi.org/10.22201/igeof.00167169p.1994.33.3.1178.