López-Gózalez, Pablo J., et al. “A New Family for the Enigmatic Sea Pen Genus Gyrophyllum Studer, 1891 (Octocorallia, Pennatulacea), a Molecular and Morphological Approach”. European Journal of Taxonomy, vol. 847, no. 1, Nov. 2022, pp. 73–103, doi:10.5852/ejt.2022.847.1983.