Hernandez-vaquero, D., Garcia-Sandoval, M. A., Fernandez-Carreira, J. M., Suarez-Vázquez, A., & Perez-Hernández, D. (2005). Measurement of bone mineral density is possible with standard radiographs: A study involving total knee replacement. Acta Orthopaedica, 76(6), 791–795. https://doi.org/10.1080/17453670510045381