Platzer, Werner (2003). Color atlas and textbook of human anatomy (5th rev. and enlarged [English] ed.). Stuttgart: Thieme. p. 238. ISBN978-1-58890-159-0. OCLC54767617.
Abrahams, Peter H.; Marks, S. C.; Hutchings, R. T. (2003). McMinn's color atlas of human anatomy (5th ed.). Edinburgh: Mosby. p. 166. ISBN0-7234-3212-0. OCLC50477357.