1. Asal: Arch. klin. Chir.186, 511 (1936).
2. Axhausen, G.: Arch. klin. Chir.99, 519 (1912);104, 581 (1914);124, 543 (1923);151, 72 (1928).
3. Axhausen, G.: Münch. med. Wschr.1922, 1219.
4. : Virchows Arch.252, 458 (1924).
5. : Bruns' Beitr.133, 89 (1925).