Carr, M.J., W.I. Rose, and R.E. Stoiber, Central America in Andesites, edited by R.S. Thorpe,pp. 149-166, Wiley, New York, 1982.
Comision Ejecutiva Hidroelectrica del Rio Lempa (CEL), 1992. Desarrollo de los Recursos Geotermicos del Area Centro-Occidental de El Salvador. Prefactibilidad Geotermica del Area de Coatepeque. Reconocimiento Geotermico. Informe Final. Unpublished internal report.
Halsor, Sid P., W.I. Rose, 1988, Common Characteristics of Paired Volcanoes in Northern Central America, J. Geophys. Res., 93, 4467-4476.
Meyer-Abich, H., Los Volcanes Activos do Guatemala y El Salvador, Anales Serv. G eol. Nacl. El Salvador Bd.,3, 49-62, 1956.
Mooser, F., H. Meyer-Abich, and A. R. McBirney, Catalogue of the Active Volcanoes of the World, Part 6, Central America, International Volcanological Association, Naples, 1958.
Pontier, N.K., 1979. Magmatic evolution of Izalco volcano and relation to the Santa Ana complex, El Salvador. Ms Thesis, Rutgers University, New Brunswick, N.J., 72pp.
Simkin, Tom and Siebert, Lee, 1994. Volcanoes of the World. Geoscience Press, Inc., Tucson, Arizona, p133-134.
West, R.C., and Augelli, J.P. Middle America: It's Lands and Peoples. Prentice Hall: New Jersey, 1966.
Weyl, R., Beitrage zur Geologie El Salvadors, 6, Die Laven der jungen Vulkane, Neues Jahrb. Geol. Palaeontol, Abhandl. 101(1), 12-38, 1955.
Woodruff, L.G., Rose, W.I., Jr. and Rigot, W., 1979. Contrasting fractionation patterns for sequential magmas from two calc-alkaline volcanoes in Central America. J. Volcanol. Geotherm., Res., 6: 217-240.