Canale-Parola, E., (1984). Genus<i> Spirochaeta</i>. In <i> Bergey's manual of systematic bacteriology, vol. 1 </i>, pp. 39-46. Edited by N. R. Krieg, Williams & Wilkins.
(1984). Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 15. <i> Int.J.Syst.Bacteriol. </i><b> 34 </b>: 355-357 .

Ehrenberg, C. G., (1835). Dritter Beitrag zur Erkenntniss grosser Organisation in der Richtung des kleinsten Raumes. In <i> Abhandlungen der Preussischen Akademie der Wissenschaften aus den Jahren 1833-1835 </i>, pp. 143-336.
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..

Adams, J. R., Whitcomb, R. F., Tully, J. G., Clark, E. A., Rose, D. L., Carle, P., Bove, J. M., Henegar, R. B., Williamson, D. L. (1997). <i>Spiroplasma alleghenense</i> sp. nov., a new species from the scorpion fly <i>Panorpa helena</i> (Mecoptera: <i>Panorpidae</i>). <i> Int.J.Syst.Bacteriol. </i><b> 47 </b>: 759-762 .

Mouches, C., Bove, J. M., Tully, J. G., Rose, D. L., McCoy, R. E., Carle-Junca, P., Garnier, M., Saillard, C. (1983). <i>Spiroplasma apis</i>, a new species from the honey-bee <i>Apis mellifera</i>. <i> Ann.Microbiol.(Inst.Pasteur) </i><b> 134 A </b>: 383-397 .
(1984). Validation of the publication of new names and new combinations previously effectively published outside the lJSB. List No. 13. <i> Int.J.Syst.Bacteriol. </i><b> 34 </b>: 91-92 .

Koerber, T., Gasparich, G. E., Frana, M. F., Grogan, W. L. (2005). <i>Spiroplasma atrichopogonis</i> sp. nov., from a ceratopogonid biting midge. <i> Int.J.Syst.Evol.Microbiol. </i><b> 55 </b>: 289-292 .

Whitcomb, R. F., Chastel, C., Abalain-Colloc, M., Stevens, C., Tully, J. G., Rose, D. L., Carle, P., Bové, J. M., Henegar, R. B., Hackett, K. J., Clark, T. B., Konai, M., Williamson, D. L. (1993). <i>Spiroplasma cantharicola</i> sp. nov., from cantharid beetles (Coleoptera: Cantharidae). <i> Int J Syst Bacteriol </i><b> 43 </b>: 421-424 .