1. E. Bueding and H. Most, Ann. Rev. Microbiol., 7, 295 (1953).
2. E. Bueding and C. Swartzwelder, Pharmacol. Revs., 9, 329 (1957).
3. J. F. Kessel and E. K. Markell, Ann. Rev. Med., 8, 415 (1957).
4. F. Hawking, Pharmacol. Revs., 7, 279 (1955).
5. H. A. Oelkers, Progress in Drug Research, Vol. 1, 159 (1959); Birkhäuser Verlag, Basel.