● Imhoff JF,Trüper HG,Pfennig N (1984). Rearrangement of the Species and Genera of the Phototrophic "Purple Nonsulfur Bacteria". Int. J. Syst. Bacteriol. 34, 340-3.
● Pfennig N (1974). Rhodopseudomonas globiformis, sp. n., a new species of the Rhodospirillaceae. Archives of Microbiology 100, 197-206.
