2 literature references for Freyella attenuata 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: Danis B & Jangoux M,
Year: 2006
Title: The SCAR-MarBIN Register of Antarctic Marine Species: Asteroidea. World Wide Web electronic publication.