1. Mud on the oceanic shelf of Guyana;Allersma;FAO Fisheries Rept no. 71-1,1969
2. Bryozoa;Bassler,1953
3. Degrees of colony dominance in stenolaemate and gymnolaemate Bryozoa;Boardman,1973
4. Les Bryozoaires miocènes du nord-ouest de l'Allemagne;Buge;Paläont. Z.,1974
5. Catalogue of the marine Polyzoa in the British Museum;Busk,1854