1. (1988). Rock glaciers In (ed.), Advances in Periglacial Geomorphology. Wiley, Chichester, pp. 69–90.
2. Late Quaternary lacustrine paleoenvironments in the Cuenca de México
3. Distribution of mountain permafrost and climate
4. (1970). Outline of a stratigraphical ‘bridge’ between the Mexico and Puebla basins. Part II. Bulletin, University of London, Institute of Archaeology, no. 8/9, 1–54.
5. (1986). Estudios glaciológicos en el Popocatépetl. Resúmenes de la Primera Reunión Nacional de Geomorfología, México, agosto de 1986, Instituto de Geografía de la UNAM, 10–11