de Thoisy, B., et al. (2008). “Assessment of large-vertebrate species richness and relative abundance in Neotropical forest using line-transect censuses: what is the minimal effort required?”. Biodiversity and Conservation17 (11): 2627–2644. doi:10.1007/s10531-008-9337-0.
Mercer, J.M. & Roth, V.L. (2003). “The effects of Cenozoic global change on squirrel phylogeny”. Science299 (5612): 1568–1572. doi:10.1126/science.1079705.