Field, K.G., G.J. Olsen, D.J. Lane, S.J. Giovannoni, M.T. Ghiselin, E.C. Raff, N.R. Pace, and R.A. Raff. Molecular phylogeny of the animal kingdom. Funch, P. and R. M. Kristensen. Cycliophora is a new phylum with affinities to Entoprocta and Ectoprocta. Garey, J. R., M. Krotec, D. R. Nelson, and J. Brooks.
Molecular analysis supports a tardigrade-arthropod association.
Garey, J. R., T. J. Near, M. R. Nonnemacher, and S. A. Nadler. Molecular evidence for Acanthocephala as a subtaxon of Rotifera. Garey, J. R., A. Schmidt-Rhaesa, T. J. Near, and S. A. Nadler. The evolutionary relationships of rotifers and acanthocephalans. Garey, J. R. and A. Schmidt-Rhaesa.