3Wu Shaoyi, Tang Xiaolang, Li Zhiqiang, et al. Studies on the induction of superior seedless mutants of "Hong Jiang sweet orange", Proceedings of the international Citrus symposium, Guangzhou, China, Nov. 5 - 8. 1990 : 142 - 148
4Hense R A. Star Ruby, a new deep - red - fleshed grapefruit variety with distinct tree characteristics, J. Rio Grand Hort SOC. 1971, 25:54 -58
5Hearn C J. Development of seedless grapefruit eultivars through budwood irradiation, C.J. , Amer. SOC. Hort. Sci, 1986, 111 (2) : 304 -306