Hanus, V. y Vanek, J. 1987. Morphology of the Wadati-Benioff zone and volcanismin Ecuador and northern Perú. Geofísica Internacional. 26, 4 (oct. 1987), 499–524. DOI:https://doi.org/10.22201/igeof.00167169p.1987.26.4.1101.