1. American Trudeau Society (1950).Am. Rev. Tuberc., 61, 274.
2. Barry, V. C., Conalty, M. L., Denneny, J. M., Gaffney, E. E., Winder, F. (1954).Irish J. Med. Sci., 339, 97.
3. Bönicke, R. (1954).Naturwiss., 41, 377.
4. Lewin, E., Hirsch, J. G. (1955).Am. Rev. Tuberc., 71, 732.
5. Pansy, F. B., Koeber, W. L., Stanier, H., Donovick, R. (1953). Ibid.,, 284.