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Bergey, D. H., Buchanan, R. E., Gibbons, N. E., (1974). Bergey's manual of determinative Bacteriology. 8th. EditionEdited by R. E. Buchanan, The Williams & Wilkins Co..

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Imhoff, J. F., Süling, J., Petri, R. (1998). Phylogenetic relationships among the <i>Chromatiaceae</i>, their taxonomic reclassification and description of the new genera <i>Allochromatium</i>, <i>Halochromatium</i>, <i>Isochromatium</i>, <i>Marichromatium</i>, <i>Thiococcus</i>, <i>Thiohalocapsa</i> and <i>Thermochromatium</i>. <i> Int.J.Syst.Bacteriol. </i><b> 48 </b>: 1129-1143 .
Bergey, D. H., Buchanan, R. E., Gibbons, N. E., (1974). Bergey's manual of determinative Bacteriology. 8th. EditionEdited by R. E. Buchanan, The Williams & Wilkins Co..
Eimhjellen, K. E. (1970). <i>Thiocapsa pfennigii</i> sp. nov., a new species of the phototrophic sulfur bacteria. <i> Arch.Mikrobiol. </i><b> 73 </b>: 193-194 .

Pfennig, N., Trüper, H. G. (1971). New nomenclatural combinations in the phototrophic sulfur bacteria. <i> Int.J.Syst.Bacteriol. </i><b> 21 </b>: 11-14 .
Felix, A., (1888). Zur Morphologie und Physiologie der Schwefelbacterien. In <i> Beiträge zur Morphologie und Physiologie der Bacterien. Heft I </i>, pp. 1-120. Edited by S. Winogradsky, Leipzig.
Bergey, D. H., Buchanan, R. E., Gibbons, N. E., (1974). Bergey's manual of determinative Bacteriology. 8th. EditionEdited by R. E. Buchanan, The Williams & Wilkins Co..

Felix, A., (1888). Zur Morphologie und Physiologie der Schwefelbacterien. In <i> Beiträge zur Morphologie und Physiologie der Bacterien. Heft I </i>, pp. 1-120. Edited by S. Winogradsky, Leipzig.
Imhoff, J. F., Süling, J., Petri, R. (1998). Phylogenetic relationships among the <i>Chromatiaceae</i>, their taxonomic reclassification and description of the new genera <i>Allochromatium</i>, <i>Halochromatium</i>, <i>Isochromatium</i>, <i>Marichromatium</i>, <i>Thiococcus</i>, <i>Thiohalocapsa</i> and <i>Thermochromatium</i>. <i> Int.J.Syst.Bacteriol. </i><b> 48 </b>: 1129-1143 .
Bergey, D. H., Buchanan, R. E., Gibbons, N. E., (1974). Bergey's manual of determinative Bacteriology. 8th. EditionEdited by R. E. Buchanan, The Williams & Wilkins Co..