Gunterberg, B. (1976) “Effects of Major Resection of the Sacrum Oinical Studies on Urogenital and Anorectal Function and a Biomechanical Study on Pelvic Strength”, Acta Orthopaedica, 47(sup162), pp. 1–38. doi: 10.3109/ort.1976.47.suppl-162.01.