2 literature references for Freyella bracteata Sladen, 1889:

Author: Sladen, W.P.
Year: 1889
Title: Report on the Asteroidea. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876, Zoology 30(51): xlii + 893 pages 118 plates.
Author: Hansson, H.G.
Year: 2001
Title: Echinodermata, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: