Tarrand JJ, Döbereiner J, Krieg NR
(1978).
A taxonomic study of the <i>Spirillum lipoferum</i> group, with descriptions of a new genus, <i>Azospirillum</i> gen. nov. and two species, <i>Azospirillum lipoferum</i> (Beijerinck) comb. nov. and <i>Azospirillum brasilense</i> sp. nov.