3. HAYASHI, T. and K. KAWASHIMA. 1983. Activities of enzymes of sugar metabolism in gamma-irradiated potato tubers. J. Food Sci. 48: 1242-1246.
4. HAYASHI, T., T. SUGIMOTO and K. KAWASHIMA. 1984. Effect of gamma-irradiation on the activities of sucrose synthase and sucrose phosphate synthase in potato tubers sweet and potato roots. Jap. J. Food. Sci. Technol. 31: 281-284.
5. HOPKINS, E. F. and J. K. PHILLIPS. 1937. Temperature and starch-sugar change in sweet potatoes. Science 86: 523-525.