Angle stable locking nails versus conventionally locked intramedullary nails in proximal tibial shaft fractures: a biomechanical study. - Thelen, Simon; Betsch, Marcel; Grassmann, Jan-Peter; Spoor, Vera; Eichler, Christian; Koebke, Jürgen; Windolf, Joachim; Hakimi, Mohssen; Wild, Michael (Archives of Orthopaedic & Trauma Surgery, 2012)