REFERENCES
- Thiele, G. H.: Coccygodynia and pain in the superior gluteal region and down the back of the thigh: Causation by tonic spasm of the levator ani, coccygeus and periformis muscles and relief by massage of these muscles. JAMA 109: 1271–1275 (October 16) 1937.
- Fletcher, W. D.: Exercises in obstetrics. In Licht, S. (Editor): Therapeutic Exercise. New Haven, Connecticut, Elizabeth Licht, Publisher, 1961, chap 35.