8Sawada S.Studies of sterile-type cool injury in rice plants with special reference to the mechanism and inheritance of sterility. Res Bull Obihiro Zootech . 1978
9Moriwaki T.Studies on responses of rice plants to cold water irragation. Japan Sci . 1958
10Toriyama K,Futsuhara Y.Inheritance of cool tolerance. In: Genetic Studies on Cool toleramce in rice I . 1960