Strzewski, B. (1913). <i> Bull.Acad.Sci.Cracovie </i><b> Ser. B </b>: 309-334 .
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.
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.
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..

Ehrenberg, C. G., (1838). Die Infusionsthierchen als vollkommene Organismen: ein Blick in das tiefere organische Leben der Natur. pp. i-xviii. L. Voss.
Perty, M., (1852). Zur Kenntnis kleinster Lebensformen. I-VIII. Jent and Reinert.
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..

Imhoff, J. F., Trüper, H. G. (1980). <i>Chromatium purpuratum</i>, sp. nov., a new species of the <i>Chromatiaceae</i>. <i> Zbl.Bakt.Hyg., I.Abt.Orig.C </i><b> 1 </b>: 61-69 .
(1980). Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 4. <i> Int.J.Syst.Bacteriol. </i><b> 30 </b>: 601 .

Caumette, P., Baulaigue, R., Matheron, R. (1988). Characterization of <i>Chromatium salexigens</i> sp. nov., a halophilic Chromatiaceae isolated from mediterranean salinas. <i> Syst.Appl.Microbiol. </i><b> 10 </b>: 288-292 .
(1989). Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 28. <i> Int.J.Syst.Bacteriol. </i><b> 39 </b>: 93-94 .