S. A.  Nadler, De Ley, P., Mundo-Ocampo, M., Smythe, A. B., Stock, S. P., Bumbarger, D., Adams, B. J., De Ley, I. T., Holovachov, A., and Baldwin, J. G., ?Phylogeny of {Cephalobina ({Nematoda})}: Molecular evidence for recurrent evolution of probolae and incongruence with traditional classifications?, Molecular Phylogenetics and Evolution, vol. 40, pp. 696?711, 2006.