Ponce, I., Mcnally, K. C., Sumin De Portilla, V., González, J., del Castillo, A., González, L., Chael, E. y French, M. (1978) « earthquake of 29 noviember 1978: a preliminary report on spatio-temporal pattern oe preceding seismic activity and mainshock relocation»., Geofísica Internacional, 17(2), pp. 109–126. doi: 10.22201/igeof.00167169p.1978.17.2.928.