1. Adelberger: Beitr. Klin. Tbk.99, 1 (1943).
2. Kupka: Amer. Rev. Tbc.42, 614 (1940). Ref. Zbl. Tbk.forsch.53, 538 (1941).
3. Garcia: Med. españ.10, 18, 100 (1947). Ref. Tbk.arzt2, 12, 819 (1948).
4. Eloesser: J. thorac. Surg. (Am.)7, 1 (1937). Ref. Zbl. Tbk.forsch.48, 261 (1938).
5. Monaldi: Ann. Ist. Forlanini2, 665 (1938). Ref. Zbl. Tbk.forsch.50, 229 (1939).