. . "Hayward, P. & Thorpe, J. 1989. Systematic notes on some Antarctic Ascophora (Bryozoa, Cheilostomata). Zoologica Scripta, 18(2): 365-374." . "1989"^^ . "1989"^^ . "Hayward & Thorpe (1989)" . "Hayward & Thorpe (1989)" . .