V. V.  Aleshin, Milyutina, I. A., Kedrova, O. S., Vladychenskaya, N. S., and Petrov, N. B., ?Phylogeny of Nematoda and Cephalorhyncha derived from 18S rDNA.?, J Mol Evol, vol. 47, pp. 597?605, 1998.

V. V.  Aleshin, Kedrova, O. S., Milyutina, I. A., Vladychenskaya, N. S., and Petrov, N. B., ?Relationships among nematodes based on the analysis of {18S} r{RNA} gene sequences:molecular evidence for monophyly of chromadorian and secernentian nematodes?, Russian Journal of Nematology, vol. 6, pp. 175?184, 1998.