1. T. J. Goldstein, G. W. Hay, B. A. Lewis and F. Smith, “Methods in Carbohydrate Chemistry,” Vol. 5, ed. by R. L. Whistler, Academic Press, New York, 1965, p. 361.
2. N. R. Smith, R. E. Gordon and F. E. Clarke, “Aerobic Sporeforming Bacteria,” U.S. Department of Agriculture, Washington, D.C., 1952, p. 40.
3. “Bergey ’s Manual of Determinative Bacteriology,” 8th ed., ed. by R. E. Buchanan and N. E. Gibbons, The Williams & Wilkins Co., Baltimore, 1974, p. 529.