Meile, L., Ludwig, W., Rueger, U., Gut, C., Kaufmann, P., Dasen, G., Wenger, S., Teuber, M. (1997). <i>Bifidobacterium lactis</i> sp. nov., a moderately oxygen tolerant species isolated from fermented milk. <i> Syst.Appl.Microbiol. </i><b> 20 </b>: 57-64 .
Cai, Y., Matsumoto, M., Benno, Y. (2000). <i>Bifidobacterium lactis</i> Meile et al. 1997 is a subjective synonym of <i>Bifidobacterium animalis</i> (Mitsuoka 1969) Scardovi and Trovatelli 1974. <i> Microbiol.Immunol. </i><b> 44 </b>: 815-820 .
(1997). Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 62. <i> Int.J.Syst.Bacteriol. </i><b> 47 </b>: 915-916 .

Sakata, S., Kitahara, M., Sakamoto, M., Hayashi, H., Fukuyama, M., Benno, Y. (2002). Unification of <i>Bifidobacterium infantis</i> and <i>Bifidobacterium suis</i> as <i>Bifidobacterium longum</i>. <i> Int.J.Syst.Evol.Microbiol. </i><b> 52 </b>: 1945-1951 .
Reuter, G. (1971). Designation of type strains for Bifidobacterium species. <i> Int.J.Syst.Bacteriol. </i><b> 21 </b>: 273-275 .
Reuter, G. (1963). Vergleichenden Untersuchung über die Bifidus-Flora im Sauglings und Erwachsenenstuhl. <i> Zentralbl.Bakteriol.Hyg.I Abt. </i><b> 191 </b>: 486-507 .

Scardovi, V., Zani, G. (1974). <i>Bifidobacterium magnum</i> sp. nov., a large, acidophilic bifidobacterium isolated from rabbit feces. <i> Int.J.Syst.Bacteriol. </i><b> 24 </b>: 29-34 .

Biavati, B., Mattarelli, P. (1991). <i>Bifidobacterium ruminantium</i> sp. nov. and <i>Bifidobacterium merycicum</i> sp. nov. from the rumens of cattle. <i> Int.J.Syst.Bacteriol. </i><b> 41 </b>: 163-168 .

Yaeshima, T., Fujisawa, T., Mitsuoka, T. (1992). <i>Bifidobacterium globosum</i>, subjective synonym of <i>Bifidobacterium pseudolongum</i>, and description of <i>Bifidobacterium pseudolongum</i> subsp. <i>pseudolongum</i> comb. nov. and <i>Bifidobacterium pseudolongum</i> subsp. <i>globosum</i> comb. nov. <i> Syst.Appl.Microbiol. </i><b> 15 </b>: 380-385 .
Biavati, B., Scardovi, V., Moore, W. E. C. (1982). Electrophoretic patterns of proteins in the genus <i>Bifidobacterium </i>and proposal of four new species. <i> Int.J.Syst.Bacteriol. </i><b> 32 </b>: 358-373 .
(1992). Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 43. <i> Int.J.Syst.Bacteriol. </i><b> 42 </b>: 656-657 .