@article {7, title = {Environmental instability and demographic variability in Acrocnida brachiata (Echinodermata: Ophiuroidea) in Douarnenez Bay (Brittany: France)}, journal = {Marine Ecology}, volume = {12}, number = {2}, year = {1991}, pages = {89-104}, author = {Bourgoin, A. and Guillou, M. and Gl{\'e}marec, M.} } @article {6, title = {Variations in the reproductive cycle of Acrocnidabrachiata (Echinodermata: Ophiuroidea) according to environment in the Bay of Douarnenez (Brittany)}, journal = {Journal of the marine biological Association U.K.}, volume = {70}, year = {1990}, pages = {57-66}, author = {Bourgoin, A. and Guillou, M.} }