Soltis, D. E., Soltis, P. S., Morgan, D. R., Swensen, S. M., Mullin, B. C., Dowd, J. M., & Martin, P. G. (1995). Chloroplast gene sequence data suggest a single origin of the predisposition for symbiotic nitrogen fixation in angiosperms.

Soltis, D E., P S. Soltis, D R. Morgan, S M. Swensen, B C. Mullin, J M. Dowd, and P G. Martin. Chloroplast Gene Sequence Data Suggest a Single Origin of the Predisposition for Symbiotic Nitrogen Fixation in Angiosperms. 1995.

Soltis, D E., et al. Chloroplast Gene Sequence Data Suggest a Single Origin of the Predisposition for Symbiotic Nitrogen Fixation in Angiosperms. 1995.