Søballe, K., Mouzin, O. R. G., Kidder, L. A., Overgaard, S., & Bechtold, J. E. (2003). The effects of hydroxyapatite coating and bone allograft on fixation of loaded experimental primary and revision implants. Acta Orthopaedica, 74(3), 239–247. https://doi.org/10.1080/00016470308540836