1. Bazett: In Med. Res. Council. Spec. Rep., Ser. Nr. 25, London: His Maj. Stat. office 1919, 181.
2. Bernard, Cl.: Zit. n. J. Sommer 41.
3. Bernard, R. et al.: Pédiatrie (Lyon) 9, 398 (1954).
4. Blalock, A.: Arch. Surg. 15, 762 (1927).
5. Brunn, v.: Monogr. Neue dtsch. Chir. 5, (1913).