1. Aiello, E., Cilia and Flagella: 353 (1974).
2. Bullock, T. H., Structure and Function in the Nervous Systems of Invertebrates 1: 135 (1965).
3. de Ceccatty, M. P., American Zoologist 14: 895 (1974).
4. DECECCATTY, M.P., ANNALES DES SCIENCES NATURELLES-ZOOLOGIE ET BIOLOGIE ANIMALE 17: 203 (1955).
5. DECECCATTY, M.P., SPONTANEOUS AND EVOKED SYSTEMS OF MOTOR ACTIVITY IN SPONGES, EUSPONGIA OFFICINALIS L AND HIPPOSPONGIA COMMUNIS-LMK, COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE D 269: 596 (1969).