1. Stedman’s Medical Dictionary,1990
2. The mechanics of the foot. Part I: the joints;Hicks;J Anat,1953
3. Motion of the first ray;D’Amico;J Am Podiatr Assoc,1979
4. Motion of the joints of the foot;Root,1977
5. Direction and range of motion of the first ray;Kelso;J Amer Podiatr Assoc,1982