1. Subotnick SI: Podiatric Sports Medicine. Mount Kisco, NY, Future Publishing Co, 1975
2. Bloom W, Fawcett DW: A Textbook of Histology. Ed 10. Philadelphia, WB Saunders Co, 1975, p 188
3. Sgarlato TE (Editor): A Compendium of Podiatric Biomechanics. San Francisco, California College of Podiatric Medicine, 1971, p 89