Heumann, W. (1962). Die Methodik der Kreuzung sternbildender Bakterien. <i> Biol.Zbl. </i><b> 81 </b>: 341-354 .
Denner, E. B. M., Kämpfer, P., Busse, H. J., Moore, E. R. B. (1999). Reclassification of <i>Pseudomonas echinoides</i> Heumann 1962, 343<sup>AL</sup>, in the genus <i>Sphingomonas</i> as <i>Sphingomonas echinoides</i> comb. nov. <i> Int.J.Syst.Bacteriol. </i><b> 49 </b>: 1103-1109 .

Yabuuchi, E., Kosako, Y., Fujiwara, N., Naka, T., Matsunaga, I., Ogura, H., Kobayashi, K. (2002). Emendation of the genus <i>Sphingomonas</i> Yabuuchi <i>et al</i>. 1990 and junior objective synonymy of the species of three genera, <i>Sphingobium</i>, <i>Novosphingobium</i> and <i>Sphingopyxis</i>, in conjunction with <i>Blastomonas ursincola</i>. <i> Int.J.Syst.Evol.Microbiol. </i><b> 52 </b>: 1485-1496 .
(1997). Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 61. <i> Int.J.Syst.Bacteriol. </i><b> 47 </b>: 601-602 .
Zipper, C., Nickel, K., Angst, W., Kohler, H.-P. E. (1996). Complete microbial degradation of both enantiomers of the chiral herbicide mecoprop [(<i>RS</i>)-2-(4-chloro-2-methylphenoxy)propionic acid] in an entantioselective manner by <i>Sphingomonas herbicidovorans</i> sp. nov. <i> Appl.Environ.Microbiol. </i><b> 62 </b>: 4318-4322 .

Yabuuchi, E., Kosako, Y., Fujiwara, N., Naka, T., Matsunaga, I., Ogura, H., Kobayashi, K. (2002). Emendation of the genus <i>Sphingomonas</i> Yabuuchi <i>et al</i>. 1990 and junior objective synonymy of the species of three genera, <i>Sphingobium</i>, <i>Novosphingobium</i> and <i>Sphingopyxis</i>, in conjunction with <i>Blastomonas ursincola</i>. <i> Int.J.Syst.Evol.Microbiol. </i><b> 52 </b>: 1485-1496 .
Takeuchi, M., Kawai, F., Shimada, Y., Yokota, A. (1993). Taxonomic study of polyethylene glycol-utilizing bacteria: emended description of the genus <i>Sphingomonas</i> and new descriptions of <i>Sphingomonas macrogoltabidus</i> sp. nov., <i>Sphingomonas sanguis</i> sp. nov., and <i>Sphingomonas terrae</i> sp. nov. <i> Syst.Appl.Microbiol. </i><b> 16 </b>: 227-238 .
(1993). Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List No. 47. <i> Int.J.Syst.Bacteriol. </i><b> 43 </b>: 864-865 .