M.  Holterman, Holovachov, O., van den Elsen, S., van Megen, H., Bongers, T., Bakker, J., and Helder, J., ?Small subunit ribosomal DNA-based phylogeny of basal Chromadoria (Nematoda) suggests that transitions from marine to terrestrial habitats (and vice versa) require relatively simple adaptations?, Molecular Phylogenetics and Evolution, vol. 48, pp. 758-763, 2008.