1. BRUINSMA, J, EUR POTATO J 5: 195 (1962).
2. BURTON, W.G., FOOD SCI ABSTR 29: 1 (1957).
3. Progress in Photobiology: Proceedings of the Third International Congress on Photobiology 1961
4. KAWAKAMI, K, EUR POTATO J 5: 40 (1962).
5. KAWAKAMI, K, MEMOIRS HYOGO U AGR 2: 1 (1952).