Ashford, R. U., Hanna, S. A., Park, D. H., Pollock, R. C., Skinner, J. A., Briggs, T. W. R., & Cannon, S. R. (2009). Proximal femoral replacements for metastatic bone disease: Financial implications for sarcoma units. Springer-Verlag.

Ashford, Robert U., Sammy A. Hanna, Derek H. Park, Rob C. Pollock, John A. Skinner, Timothy W. R. Briggs, och Stephen R. Cannon. Proximal Femoral Replacements for Metastatic Bone Disease: Financial Implications for Sarcoma Units. Springer-Verlag, 2009.

Ashford, Robert U., et al. Proximal Femoral Replacements for Metastatic Bone Disease: Financial Implications for Sarcoma Units. Springer-Verlag, 2009.