Bavestrello 1987. Description of the hydroid Perarella propagulata sp. nov. (Cnidaria, Hydrozoa) and a discussion of relations within the superfamily Bougainvillioidea Petersen. Bouillon, J.; Boero, F.; Cicogna, F.; Cornelius, P.F.S.[Eds]. Modern trends in the systematics, ecology, and evolution of hydroids and hydromedusae., Clarendon Press, Oxford, 1987: 1-328. Chapter pagination: 19-27