Sarras, M. P.; Madden, M. E.; Zhang, X.; Gunwar, S.; Huff, J. K.; Hudson, B. G. (1991). "Extracellular matrix (mesoglea) of Hydra vulgaris". Developmental Biology148 (2): 481–494. PMID1743396. doi:10.1016/0012-1606(91)90266-6.
Werner, B.; Chapman, D. M.; Cutress, C. E. (1976). "Muscular and nervous systems of the cubopolyp (Cnidaria)". Experientia32 (8): 1047–1049. doi:10.1007/BF01933964.
Hernandez-Nicaise, M. L. (1973). "The nervous system of ctenophores III. Ultrastructure of synapses". Journal of Neurocytology2 (3): 249–263. PMID9224490. doi:10.1007/BF01104029.
Sarras, M. P.; Madden, M. E.; Zhang, X.; Gunwar, S.; Huff, J. K.; Hudson, B. G. (1991). "Extracellular matrix (mesoglea) of Hydra vulgaris". Developmental Biology148 (2): 481–494. PMID1743396. doi:10.1016/0012-1606(91)90266-6.
Hernandez-Nicaise, M. L. (1973). "The nervous system of ctenophores III. Ultrastructure of synapses". Journal of Neurocytology2 (3): 249–263. PMID9224490. doi:10.1007/BF01104029.
Kier, W. M. (2012). "The diversity of hydrostatic skeletons". Journal of Experimental Biology215 (8): 1247–1257. PMID22442361. doi:10.1242/jeb.056549.