Willems, W. R.; Wallberg, A.; Jondelius, U.; Littlewood, D. T. J.; Backeljau, T.; Schockaert, E. R.; Artois, T. J. (2006). Filling a gap in the phylogeny of flatworms: relationships within the Rhabdocoela (Platyhelminthes), inferred from 18S ribosomal DNA sequences. Zoologica Scripta 35: 1-17.
Zoologica Scripta. 35: 1-17.