Olséen, P. et al. 2008. The Hansson Twin Hook is adequate for fixation of trochanteric fractures: 2 fixation failures in a series of 157 prospectively followed patients. Acta Orthopaedica. 79, 5 (Jan. 2008), 602–608. DOI:https://doi.org/10.1080/17453670810016605.