1. W.A. Pardee u. B. F. Dodge: Ind. Engng. Chem. 85, 273 (1943)
2. Erichsen, L. v.: Angew. Chem. 61, 322 (1949).
3. Spencer, H. C., u. J Mitarb.: J. ind. Hyg. Toxicol. 24, 295 (1942).
4. Brandt: Heat, and Ventilat. 48, Nr. 3, 67 (1946).
5. Bonastre: J. Pharmac. [2] 13, 149 (1827); 17, 338 (1831).