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Byrne JH, Castellucci VF, Kandel ER (March 1978). "Contribution of individual mechanoreceptor sensory neurons to defensive gill-withdrawal reflex in Aplysia". Journal of Neurophysiology. 41 (2): 418–431. doi:10.1152/jn.1978.41.2.418. PMID650275.
Fischer TM, Jacobson DA, Counsell AN, Pelot MA, Demorest K (March 2011). "Regulation of low-threshold afferent activity may contribute to short-term habituation in Aplysia californica". Neurobiology Learning and Memory. 95 (3): 248–259. doi:10.1016/j.nlm.2010.11.016. PMID21144906.
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Eernisse, Douglas J.; Kim, Chang Bae; Moon, Seung Yeo; Gelder, Stuart R.; Kim, Won (September 1996). "Phylogenetic Relationships of Annelids, Molluscs, and Arthropods Evidenced from Molecules and Morphology". Journal of Molecular Evolution. 43 (3): 207–215. Bibcode:1996JMolE..43..207K. doi:10.1007/PL00006079. PMID8703086.[dead link]
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Eernisse, Douglas J.; Kim, Chang Bae; Moon, Seung Yeo; Gelder, Stuart R.; Kim, Won (September 1996). "Phylogenetic Relationships of Annelids, Molluscs, and Arthropods Evidenced from Molecules and Morphology". Journal of Molecular Evolution. 43 (3): 207–215. Bibcode:1996JMolE..43..207K. doi:10.1007/PL00006079. PMID8703086.[dead link]
Maloof, Adam C.; Rose, Catherine V.; Beach, Robert; Samuels, Bradley M.; Calmet, Claire C.; Erwin, Douglas H.; Poirier, Gerald R.; Yao, Nan; Simons, Frederik J. (17 August 2010). "Possible animal-body fossils in pre-Marinoan limestones from South Australia". Nature Geoscience. 3 (9): 653. Bibcode:2010NatGe...3..653M. doi:10.1038/ngeo934.
Eernisse, Douglas J.; Albert, James S.; Anderson, Frank E. (1 September 1992). "Annelida and Arthropoda are not sister taxa: A phylogenetic analysis of spiralean metazoan morphology". Systematic Biology. 41 (3): 305–330. doi:10.2307/2992569. ISSN1063-5157. JSTOR2992569.
Nicholls JG, Baylor DA (September 1968). "Specific modalities and receptive fields of sensory neurons in CNS of the leech". Journal of Neurophysiology. 31 (5): 740–756. doi:10.1152/jn.1968.31.5.740. PMID5711143.
Pastor J, Soria B, Belmonte C (June 1996). "Properties of the nociceptive neurons of the leech segmental ganglion". Journal of Neurophysiology. 75 (6): 2268–2279. doi:10.1152/jn.1996.75.6.2268. PMID8793740.
Byrne JH, Castellucci VF, Kandel ER (March 1978). "Contribution of individual mechanoreceptor sensory neurons to defensive gill-withdrawal reflex in Aplysia". Journal of Neurophysiology. 41 (2): 418–431. doi:10.1152/jn.1978.41.2.418. PMID650275.
Fischer TM, Jacobson DA, Counsell AN, Pelot MA, Demorest K (March 2011). "Regulation of low-threshold afferent activity may contribute to short-term habituation in Aplysia californica". Neurobiology Learning and Memory. 95 (3): 248–259. doi:10.1016/j.nlm.2010.11.016. PMID21144906.
Eernisse, Douglas J.; Kim, Chang Bae; Moon, Seung Yeo; Gelder, Stuart R.; Kim, Won (September 1996). "Phylogenetic Relationships of Annelids, Molluscs, and Arthropods Evidenced from Molecules and Morphology". Journal of Molecular Evolution. 43 (3): 207–215. Bibcode:1996JMolE..43..207K. doi:10.1007/PL00006079. PMID8703086.[dead link]
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Eernisse, Douglas J.; Albert, James S.; Anderson, Frank E. (1 September 1992). "Annelida and Arthropoda are not sister taxa: A phylogenetic analysis of spiralean metazoan morphology". Systematic Biology. 41 (3): 305–330. doi:10.2307/2992569. ISSN1063-5157. JSTOR2992569.
Barnes, Robert D. (1968). Invertebrate Zoology (2nd ed.). W.B. Saunders. OCLC173898.