de Waal Malefijt, A. C., van Kampen, A. and Slooff, T. J. J. H. (1995) “Bone grafting in cemented knee replacement:45 primary and secondary cases followed for 2-5 years”, Acta Orthopaedica, 66(4), pp. 325–328. doi: 10.3109/17453679508995554.