Strain, S. R., Leung, K., Whittam, T. S., de Bruijn, F. J., & Bottomley, P. J. (1994). Genetic Structure of Rhizobium leguminosarum biovar trifolii and viciae Populations Found in Two Oregon Soils under Different Plant Communities. Appl Environ Microbiol.

Strain, Steven R., Kamtin Leung, Thomas S. Whittam, Frans J. de Bruijn, e Peter J. Bottomley. "Genetic Structure of Rhizobium Leguminosarum Biovar Trifolii and Viciae Populations Found in Two Oregon Soils Under Different Plant Communities." Appl Environ Microbiol 1994.

Strain, Steven R., et al. "Genetic Structure of Rhizobium Leguminosarum Biovar Trifolii and Viciae Populations Found in Two Oregon Soils Under Different Plant Communities." Appl Environ Microbiol 1994.