Pyataeva, S. V., R. R. Hopcroft, D. J. Lindsay, and A. G. Collins. “DNA Barcodes Unite Two Problematic Taxa: the Meiobenthic Boreohydra simplex Is a Life-Cycle Stage of Plotocnide Borealis (Hydrozoa: Aplanulata)”. Zootaxa, vol. 4150, no. 1, Aug. 2016, pp. 85–92, doi:10.11646/zootaxa.4150.1.5.