M. V.  Sorensen, Hebsgaard, M. B., Heiner, I., Glenner, H., Willerslev, E., and Kristensen, R. M., ?New data from an enigmatic phylum: evidence from molecular sequence data supports a sister-group relationship between Loricifera and Nematomorpha?, Journal of Zoological Systematics and Evolutionary Research, vol. 46, pp. 231-239, 2008.