1. Aho KA, Long RA, Kie JG, Bowyer RT (2010) A new index for measuring perpendicularity of animal movements in relation to patch boundaries. Ecol Model 221:2003–2007
2. Auffenberg W, Franz R (1982) The status and distribution of the gopher tortoise (Gopherus polyphemus). In: Bury RB (ed) North American tortoises: conservation and ecology. US Fish and Wildlife Service, Wildl Res Rep 12, Washington DC, pp 95–126
3. Auffenberg W, Iverson JB (1979) Demography of terrestrial turtles. In: Harless M, Morlock M (eds) Turtles: perspectives and research. Wiley, New York, pp 541–569
4. Batschelet E (1981) Circular statistics in biology. Academic, New York
5. Battin J (2004) When good animals love bad habitats: ecological traps and the conservation of animal populations. Conserv Biol 18:1482–1491