1. Aguinaldo, A. M. A., J. M. Turbeville, L. S. Linford, M. C. Rivera, J. R. Garey, R. A. Raff & J. A. Lake, 1997. Evidence for a clade of nematodes, arthropods and other moulting animals. Nature 387: 489–493.
2. Aleshin, V. V., O. S. Kedrova, I. A. Milyutina, N. S. Vladychenskaya & N. B. Petrov, 1998. Relationships among nematodes based on the analysis of 18S rRNA gene sequences: molecular evidence for monophyly of chromadorian and secernentian nematodes. Russian Journal of Nematology 6: 175–184.
3. Andrássy, I., 1999. A census of genera and subgenera of free-living nematodes. Journal of Nematode Morphology and Systematics 2(1): 45–68.
4. Andrássy, I., 1992. A short census of free-living nematodes. Fundamental and applied Nematologie 15(2): 187–188.
5. Blaxter, M.L., De Ley, P., Garey, J., Liu, L.X., Scheldemen, P., Vanfleteren, J., Mackey, L.Y., Dorris, M., Frisse, L.M., Vida, J.T., & W.K. Thomas, 1998. A molecular evolutionary framework for the phylum Nematoda. Nature 392: 71–75.