Berger, Pia, Alejandro Nava Pichardo, Carlos Valdés González, and Alicia Martínez Bringas. 2011. “New Locations of Volcano-Tectonic Earthquakes under Popocatépetl Volcano Applying a Genetic Search Algorithm”. Geofisica Internacional 50 (3):319-40. https://doi.org/10.22201/igeof.00167169p.2011.50.3.230.