P. J.  Hayward and Ryland, J. S., Cheilostomatous Bryozoa Part II. Hippothooidea - Celleporoidea, 2nd ed., vol. 14. Published for the Linnean Society of London and the Estuarine and Coastal Water Sciences Association by Field Studies Council, Shrewsbury, 1999, p. 416pp.

P. J.  Hayward and Ryland, J. S., Cheilostomatous Bryozoa Part I. Aeteoidea - Cribrilinoidea, vol. 10. Published for the Linnean Society of London and the Estuarine and Coastal Water Sciences Association by Field Studies Council, Shrewsbury, 1998.

P. J.  Hayward, ?Systematic and morphological studies on some European species of Turbicellepora (Bryozoa, Cheilostomata)?, Journal of Natural History, vol. 12, 1978.

P. J.  Hayward and Ryland, J. S., Cyclostome Bryozoans, vol. 34. E.J.Brill for the Linnaean Society, London, 1985, p. 147pp.

P. J.  Hayward and Ryland, J. S., British Ascophoran Bryozoans, vol. 14. Academic Press for the Linnaean Society, London, 1979, p. 312pp.

J. D. D.  Bishop and Hayward, P. J., ?SEM Atlas of type and figured material from Robert Lagaaij's 'The Pliocene Bryozoa of the Low Countries' (1952)?, Mededelingen Rijks Geologische Dienst, vol. 43, 1989.