[Improvement in the overhead-extension technic].

@article{Brodhun1972ImprovementIT,
  title={[Improvement in the overhead-extension technic].},
  author={J Brodhun and R Andress},
  journal={Beitrage zur Orthopadie und Traumatologie},
  year={1972},
  volume={19 10},
  pages={606-8}
}