1. Apitz: Virchows Arch.289, 46 (1933).
2. Aschoff: angef. n.Caan Erg. Chir.17 (1924).
3. Axhausen: Arch. klin. Chir.94, 331 (1910);99, 519 (1912);104, 301, 581 (1914);114, 1 (1920).
4. —: Arch. orthop. Chir.20, 1 (1922).
5. —: Bruns' Beitr.126, 541 (1922).