Andrews,Robin M (1979): Evolution of li: Zool. 134(4): 107-138. Gans, C. and EE Williams. 1954. Present knowledge of the http://www.mcz.harvard.edu/Departments/Herpetology/breviora.htm
SNAKES VERSUS BIRDS; BIRDS VERSUS SNAKES: In Boulenger's Fauna of British India (22, p. 393) we read concerning the genus http://elibrary.unm.edu/sora/Wilson/v044n02/p0088-p0113.html
