[1]
Ronowicz, M. and Schuchert, P. 2007.

Halecium arcticum (Cnidaria: Hydrozoa), a new species of hydroid  from Spitsbergen

. Zootaxa. 1549, 1 (Aug. 2007), 55–62. DOI:https://doi.org/10.11646/zootaxa.1549.1.4.