Yabe Y., Hatori M., Kumagai J., Koizumi N., Sakuma T., and Kawamura M. “Heterotopic Ossification of the Distal Portion of Biceps Femoris”. Upsala Journal of Medical Sciences, vol. 111, no. 3, July 2009, pp. 321-7, doi:10.3109/2000-1967-058.