F. J. Kummer, O. Olsson, C. A. Pearlman, L. Ceder, S. Larsson, and K. J. Koval, “Intramedullary versus extramedullar fixation of subtrochanteric fractures: A biomechanical study”, ActaO, vol. 69, no. 6, pp. 580–584, Jan. 1998.