Zaragoza, Gabriela, et al. “Secondary Lahars at Popocatépetl Volcano: The Nexpayantla Lahar of February 4th, 2010: Español”. Revista Mexicana De Ciencias Geológicas, vol. 37, no. 2, July 2020, pp. 121-34, doi:10.22201/cgeo.20072902e.2020.2.1565.