Gage, DJ (de junio de 2004). «Infection and invasion of roots by symbiotic, nitrogen-fixing rhizobia during nodulation of temperate legumes.». Microbiology and molecular biology reviews : MMBR68 (2): 280-300. PMID15187185. doi:10.1128/MMBR.68.2.280-300.2004.
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Gage, DJ (de junio de 2004). «Infection and invasion of roots by symbiotic, nitrogen-fixing rhizobia during nodulation of temperate legumes.». Microbiology and molecular biology reviews : MMBR68 (2): 280-300. PMID15187185. doi:10.1128/MMBR.68.2.280-300.2004.