[1]
V. Hoikka, M. Poussa, T. Yrjönen, and K. Österman, “Intertrochanteric varus osteotomy for Perthes’ disease: Radiographic changes after 2–16-year follow-up of 126 hips”, ActaO, vol. 62, no. 6, pp. 549–553, Jan. 1991.