Minard L. Hall

The enormous Chillos Valley Lahar: an ash-flow-generated debris flow from Cotopaxi Volcano, Ecuador

Patricia Mothes, P. Mothes, R. Janda, 1998 .

Possible causes for the seismic activity observed in Cotopaxi Volcano, Ecuador

Mario Ruiz, Jean-Luc Chatelain, Bertrand Guillier, 1998 .

Degassing patterns of Tungurahua volcano (Ecuador) during the 1999–2006 eruptive period, inferred from remote spectroscopic measurements of SO2 emissions

Hugo Yepes, I. Molina, J. Pennec, 2008 .

The 2005 eruption of Sierra Negra volcano, Galápagos, Ecuador

Michael P. Poland, W. Chadwick, D. Geist, 2008 .