Wiens JJ, Brandley MC, Reeder TW (January 2006). "Why does a trait evolve multiple times within a clade? Repeated evolution of snakelike body form in squamate reptiles". Evolution; International Journal of Organic Evolution. 60 (1): 123–41. doi:10.1554/05-328.1. ISSN0014-3820. PMID16568638. S2CID17688691.
Wiens JJ, Brandley MC, Reeder TW (January 2006). "Why does a trait evolve multiple times within a clade? Repeated evolution of snakelike body form in squamate reptiles". Evolution; International Journal of Organic Evolution. 60 (1): 123–41. doi:10.1554/05-328.1. ISSN0014-3820. PMID16568638. S2CID17688691.
Wiens JJ, Brandley MC, Reeder TW (January 2006). "Why does a trait evolve multiple times within a clade? Repeated evolution of snakelike body form in squamate reptiles". Evolution; International Journal of Organic Evolution. 60 (1): 123–41. doi:10.1554/05-328.1. ISSN0014-3820. PMID16568638. S2CID17688691.
Wiens JJ, Brandley MC, Reeder TW (January 2006). "Why does a trait evolve multiple times within a clade? Repeated evolution of snakelike body form in squamate reptiles". Evolution; International Journal of Organic Evolution. 60 (1): 123–41. doi:10.1554/05-328.1. ISSN0014-3820. PMID16568638. S2CID17688691.