1. M. A. Amerine, R. M. Pangborn, and E. B. Roessler, 1965 . "Principles of Sensory Evaluation of Food ," p. 451 . Academic Press, New York.
2. Anon , 1976 . Chemical Marketing Report. May 10.
3. L. H. Bartlett, 1941 . Quick freezing of foodstuffs. U. S. Patent #2,418,745. March 24.
4. O. S. H. Bland, 1936 . Improvements relating to the preservation of perishable articles by freezing . B. P. 454,200, September 25.