1. Boero, F.& J. Bouillon, 1987. Inconsistent evolution and paedomorphosis among hydroids and medusae of Athecatae/Anthomedusae and Thecatae/Leptomedusae (Cni-daria, Hydrozoa). In J. Bouillon, F. Boero, F. Cicogna & P.F.S. Cornelius (eds), Modern trends in the systematics, ecology, and evolution of hydroids and hydromedusae. Clarendon Press, Oxford: 229–250.
2. Boero, F. & J. Bouillon, 1989. An evolutionary interpretation of anomalous medusoid stages in the life cycles of some Leptomedusae (Cnidaria). In J.S. Ryland & P.A. Tyler (eds), Reproduction, Genetics and Distributions of Marine Organisms, Olsen & Olsen, Fredensborg: 37–41.
3. Boero, F. & M. Sarà, 1987. Motile sexual stages and evolution of Leptomedusae (Cnidaria). Boll. Zool. 54: 131–139.
4. Bouillon, J., 1975. Sur la reproduction et l’écologie de Paracoryne huvei Picard (Tubularoidea - Athecata - Hydrozoa - Cnidaria). Archs Biol, Liège 86: 45–96.
5. Bouillon, J., 1983. Sur le cycle biologique de Eirene hexanemalis (Goette, 1886) (Eirenidae, Leptomedusae, Hydrozoa, Cnidaria). Cah. Biol. mar. 24: 421–427.