Pérez et al., p. 109. (EN) Carlos Daniel Pérez, Bárbara de Moura Neves, Ralf Tarciso Cordeiro, Gary C. Williams, Stephen D. Cairns, The Cnidaria , Past , Present and Future, in S. Goffredo, Z. Dubinsky, Springer International Publishing Switzerland, 2016, p. 109–123. URL consultato il 19 marzo 2020.
Pérez et al., p. 110. (EN) Carlos Daniel Pérez, Bárbara de Moura Neves, Ralf Tarciso Cordeiro, Gary C. Williams, Stephen D. Cairns, The Cnidaria , Past , Present and Future, in S. Goffredo, Z. Dubinsky, Springer International Publishing Switzerland, 2016, p. 109–123. URL consultato il 19 marzo 2020.
Pérez et al., p. 111. (EN) Carlos Daniel Pérez, Bárbara de Moura Neves, Ralf Tarciso Cordeiro, Gary C. Williams, Stephen D. Cairns, The Cnidaria , Past , Present and Future, in S. Goffredo, Z. Dubinsky, Springer International Publishing Switzerland, 2016, p. 109–123. URL consultato il 19 marzo 2020.
