1 2 3 Pough et al. 1992. Herpetology: Third Edition. Pearson Prentice Hall:Pearson Education, Inc., 2002.
↑ Courtship and Pelvic Spur Use in the Burmese Python, Python molurus bivittatus. James C. Gillingham and Jeffrey A. Chambers. Copeia, Vol. 1982, No. 1 (Feb. 23, 1982), pp. 193-196. http://www.jstor.org/stable/1444292
↑ Combat Bouts with Spur Use in the Madagascan Boa (Sanzinia madagascariensis). Charles C. Carpenter, James B. Murphy and Lyndon A. Mitchell. Herpetologica, Vol. 34, No. 2 (Jun., 1978), pp. 207-212. http://www.jstor.org/stable/3891678
