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Sonnenburg JL, Angenent LT, Gordon JI (June 2004). "Getting a grip on things: how do communities of bacterial symbionts become established in our intestine?". Nature Immunology. 5 (6): 569–73. doi:10.1038/ni1079. PMID15164016. S2CID25672527.
Laurin M, Everett ML, Parker W (April 2011). "The cecal appendix: one more immune component with a function disturbed by post-industrial culture". Anatomical Record. 294 (4): 567–79. doi:10.1002/ar.21357. PMID21370495. S2CID3237168.