1. J. Takamine, J. Ind. Eng. Chem. 6, 824 (1914).
2. L. A. Underkofler, E. I. Fulmer, and L. Schoene, Ind. Eng. Chem. 31, 734 (1939).
3. D. P. Langlois, Food Technol. 7, 303 (1953).
4. T. Harada, Ind. Eng. Chem. 23, 1424 (1931).
5. H. F. Smyth and W. L. Obold, Industrial Microbiology: The Utilization of Bacteria, Yeasts and Molds in Industrial Processes, Ch. 32, p. 256, Williams & Wilkins Co., Baltimore (1930).