2Anna Di Cosmo, Carlo Di Cristo, 1998. Neuropeptidergic control of the optic gland of Octopus vulgaris: fmrf-amide and GnRH immunoreactivity. Journal of Comparative Neurology 398:1-12.
3Binyamin Hochner, Tal Shomrat, Graziano Fiorito, 2006. The octopus: a model for a comparative analysis of the evolution of learning and memory mechanisms. Neurobiology of Oc topus Learning, 7:308-317.
4Boycott B B, 1961. The functional organization of the brain of the cuttlefish Sepia officinalis. Proc R Soc Lond B, 153: 503-534.
5Boyle P R, Thorpe R S, 1984. Optic gland enlargement and female gonad maturation in a population of the octopus Ele done cirrhosa: a multivariate analysis. Marine Biology, 79: 127-132.
6Chinari Onitsuka, Akihiko Yamaguchi, Hikoichirou Kanamaru et al, 2009. Molecular cloning and expression analysis of a GnRH-like dodecapeptide in the swordtip squid, Loligo edulis. Zoological Science, 26:203-208.
7Diter Froesch, 1974. The subpeduncle lobe of the octopus brain: evidence for dual function. Brain Research, 75:277-285.
8Dwight Arrieche, 1999. Ultrastructure of the optic gland of the squid Sepiotheutis sepioidea (Cephalopoda: Loliginidae). Revista de Biolog i a Tropical, 47(4): 831-842.
9Iwakoshi-Ukena E, Ukena K, Takuwa Kuroda K et al, 2004. Expression and distribution of octopus gonadotropin releasing hormone in the central nervous system and pe ripheral organs of the octopus (Octopus vulgaris) by in situ hybridization and immunohistochemistry. J Comp Neurol, 477:310-323.
10Messenger J B, 1967a. The effects on locomotion of lesions to the visuo-motor system in octopus. Proe R Soc Lond B, 167: 252-281.