1. Davis, W. H., Route to hybrid soybean production,U.S. Patent, 1985, 4545146.
2. Sun, H., Zhao, L. M., Huang, M., A study on the cytoplasm-nuclear male sterile soybean line,Chinese Science Bulletin, 1994, 38(16): 1535.
3. Gai, J. Y., Cui, Z. L., Ji, D. F.et al., A report on the nuclear cytoplasmic male sterility from a cross between two soybean cultivars,Soybean Genetics Newsletter, 1995, 22: 55.
4. Zhang, L., Dai, O. H., Selection and breeding of cytoplasm-nuclear male sterile soybean line W931 A,Scientia Agricultura Sinica (in Chinese), 1997, 30(6): 90.