2 literature references for Microciona armata Bowerbank, 1866:

Author: Howson, C.M.; Picton, B.E. (Ed.)
Year: 1997
Title: The species directory of the marine fauna and flora of the British Isles and surrounding seas.
Source: Ulster Museum Publication, 276. The Ulster Museum: Belfast, UK. ISBN 0-948150-06-8. vi, 508 (+ cd-rom) pp.
Author: Van Soest, R.W.M.
Year: 2001
Title: Porifera, in: Costello, M.J. et al. (Ed.) (2001).
Source: 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: