Johnson, J. L., Holdeman, L. V. (1983). <i>Bacteroides intermedius </i>comb. nov. and description of <i>Bacteroides corporis </i>sp. nov. and <i>Bacteroides levii </i>sp. nov. <i> Int.J.Syst.Bacteriol. </i><b> 33 </b>: 15-25 .
Shah, H. N., Collins, M. D., Olsen, I., Paster, B. J., Dewhirst, F. E. (1995). Reclassification of <i>Bacteroides levii</i> (Holdeman, Cato and Moore) in the genus <i>Porphyromonas</i>, as <i>Porphyromonas levii</i> comb. nov. <i> Int.J.Syst.Bacteriol. </i><b> 45 </b>: 586-588 .

Summanen, P. H., Durmaz, B., Väisänen, M. L., Liu, C., Molitoris, D., Eerola, E., Helander, I. M., Finegold, S. M. (2005). <i>Porphyromonas somerae</i> sp. nov., a pathogen isolated from humans and distinct from <i>Porphyromonas levii</i>. <i> J.Clin.Microbiol. </i><b> 43 </b>: 4455-4459 .
Editor, L. (2006). List of new names and new combinations previously effectively, but not validly, published - Validation List no. 109. <i> Int.J.Syst.Evol.Microbiol. </i><b> 56 </b>: 925-927 .

Finegold, S. M., Vaisanen, M. L., Rautio, M., Eerola, E., Summanen, P., Molitoris, D., Song, Y., Liu, C., Jousimies-Somer, H. (2004). <i>Porphyromonas uenonis</i> sp. nov., a pathogen for humans distinct from <i>P. asaccharolytica</i> and <i>P. endodontalis</i>. <i> J.Clin.Microbiol. </i><b> 42 </b>: 5298-5301 .
(2005). Validation of publication of new names and new combinations previously effectively published outside the IJSEM. List No. 102. <i> Int.J.Syst.Evol.Microbiol. </i><b> 55 </b>: 547-549 .

Avgustin, G., Wallace, R. J., Flint, H. J. (1997). Phenotypic diversity among ruminal isolates of <i>Prevotella ruminicola</i>: proposal of <i>Prevotella brevis</i> sp. nov., <i>Prevotella bryantii</i> sp. nov., and <i>Prevotella albensis</i> sp. nov. and redefinition of <i>Prevotella ruminicola</i>. <i> Int.J.Syst.Bacteriol. </i><b> 47 </b>: 284-288 .
Holdemann, L. V., Cato, E. P., Moore, W. E. C., (1977). Anaerobe laboratory manual. Virginia Polytechn. Inst. and State Univ..
Bryant, M. P., Small, N., Bouma, C., Chu, H. (1958). <i>Bacteroides ruminicola </i>sp. nov. and <i>Succinomonas amylolytica</i> gen. nov. species of succinic acid-producing anaerobic bacteria of the bovine rumen. <i> J.Bacteriol. </i><b> 76 </b>: 15-23 .