1. Note: Neurolepis as a sensitive indicator of human activity in the High Andes;Bromley;American Antiquity,1971
2. Informe al gobierno del Ecuador sobre reconocimientos edafologicos exploratorios, Rome;Frei;FAO Report No. 585,1957
3. Life zone ecology;Holdridge,1967
4. Red Data Book, 1. Mammalia;International Union for Conservation of Nature (IUCN),1972