Shands, A. R., and G. Dean Macewen. “Congenital Abnormalities of the Femur: A Brief Review of the Cases Observed at the Alfred I. Du Pont Institute and a Report of the Treatment of One Case of Partial Absence”. Acta Orthopaedica, vol. 32, no. 1-4, Jan. 1962, pp. 307-14, doi:10.3109/17453676208989587.