1. Ding, Y., A preliminary report on the cultivation and the distribution of Hsien and Keng rice in ancient China and the classification of current cultivars,Memoir Coll. Agr. Sun Yatsen Univ. (in Chinese), 1949, 6: 1.
2. Ding, Y., The origin and evolution of cultivated rice in China, inSelected Papers of Rice Cultivation (in Chinese), Beijing: Agriculture Press, 1959, 5–27.
3. National coordinated group of wild-rice resources, General survey of wild rice resources in China,Scientia Agricultural Sinica (in Chinese), 1984, 17(6): 1.
4. Yan, W. M., Agriculture origin of rice cultivation in China,Agricultural Archaeology (in Chinese), 1982, 2: 50.
5. Yan, W. M., More comments on the agricultural origin of rice cultivation in China,Agricultural Archaeology (in Chinese), 1989, 2: 72.