British anascan bryozoans. Cheilostomata: Anasca: keys and notes for the identification of the species
Ryland, J.S.; Hayward, P.J. (1977). British anascan bryozoans. Cheilostomata: Anasca: keys and notes for the identification of the species. Synopses of the British Fauna, N.S. 10. Academic Press: London. ISBN 0-12-605250-6. 118 pp.
Deel van: Barnes, R.S.K.; Crothers, J.H. (Ed.) Synopses of the British Fauna. Linnean Society of London: London; New York. ISSN 0082-1101, meer
