T. Hasenaka, I. S. E. Carmichael: The cinder cones of Michoacán-Guanajuato, central Mexico: their age, volume and distribution, and magma discharge rate. In: J. Volc. Geotherm. Res., 1985, 25, S. 105–124; geo.mtu.edu (PDF; 1,1 MB)
S. Siebe, V. Rodriguez-Lara, P. Schaaf, M. Abrams: Radiocarbon ages of Holocene Pelado, Guespalapa, and Chichinautzin scoria cones, south of Mexico City: implications for archaeology and future hazards. In: Bull. Volc., 2004, 66, S. 203–225; geo.mtu.edu (PDF; 1,8 MB)
