1. Antopol, W., S. Glaubach andL. Goldman: Effects of a new tetrazolium derivative on tissue, bacteria and onion root tips. Pulb. Hlth. Rep. (Wash.)63, 1231 (1948).
2. Arima, J., K. Yamamoto, S. Kakimoto andY. Takahashi: The tetrazolium-reducing action of BCG. I. Fundamental experiments on the measurement of the reaction. Jap. J. Tuberc.2, 222 (1954).
3. Arima, J., K. Yamamoto, S. Kakimoto andY. Takahashi: The tetrazolium-reducing action of BCG. II. Relation between tetrazolium-reducing action and viability of the bacilli. Jap. J. Tuberc.2, 278 (1954).
4. Baldwin, E.: Dynamic aspects of biochemistry 2nd Ed. Cambridge: Cambridge University Press 1952.
5. Barnes, E.: Tetrazolium reduction as a means of differentiating Streptococcus faecalis from Streptococcus faecium. J. gen. Microbiol.14, 57 (1956).