Niinimaki, Timo, and Pekka Jalovaara. “Bone Loss from the Proximal Femur After Arthroplasty With an Isoelastic Femoral stem:BMD Measurements in 25 Patients After 9 Years”. Acta Orthopaedica, vol. 66, no. 4, Jan. 1995, pp. 347-51, doi:10.3109/17453679508995559.