Noda S, Kitade O, Inoue T, Kawai M, Kanuka M, Hiroshima K, et al. (marzo de 2007). "Cospeciation in the triplex symbiosis of termite gut protists (Pseudotrichonympha spp.), their hosts, and their bacterial endosymbionts". Molecular Ecology16 (6): 1257–1266. PMID17391411. doi:10.1111/j.1365-294X.2006.03219.x.
Harada KI, Yamamoto K, Saito T (maio de 2006). "Effective treatment of coprophagia in a patient with schizophrenia with the novel atypical antipsychotic drug perospirone". Pharmacopsychiatry39 (3): 113. PMID16721701. doi:10.1055/s-2006-941487.
Noda S, Kitade O, Inoue T, Kawai M, Kanuka M, Hiroshima K, et al. (marzo de 2007). "Cospeciation in the triplex symbiosis of termite gut protists (Pseudotrichonympha spp.), their hosts, and their bacterial endosymbionts". Molecular Ecology16 (6): 1257–1266. PMID17391411. doi:10.1111/j.1365-294X.2006.03219.x.
Harada KI, Yamamoto K, Saito T (maio de 2006). "Effective treatment of coprophagia in a patient with schizophrenia with the novel atypical antipsychotic drug perospirone". Pharmacopsychiatry39 (3): 113. PMID16721701. doi:10.1055/s-2006-941487.
Rose EA, Porcerelli JH, Neale AV (2000). "Pica: common but commonly missed". The Journal of the American Board of Family Practice13 (5): 353–358. PMID11001006.
Rothman JM, Pell AN, Nkurunungi JB, Dierenfeld ES (2006). "Nutritional aspects of the diet of wild gorillas."(PDF). En Newton-Fisher NE, Notman H, Paterson JD, Reynolds V. Primates of Western Uganda. New York, NY: Springer Science & Business Media. pp. 153–169. ISBN978-0-387-33505-6. Arquivado dende o orixinal(PDF) o 18 de outubro de 2012.
"Is Oral Sex Safe?". University Health Center at the University of Georgia. Arquivado dende o orixinal o 10 de outubro de 2007. Consultado o 2007-10-12.
Rothman JM, Pell AN, Nkurunungi JB, Dierenfeld ES (2006). "Nutritional aspects of the diet of wild gorillas."(PDF). En Newton-Fisher NE, Notman H, Paterson JD, Reynolds V. Primates of Western Uganda. New York, NY: Springer Science & Business Media. pp. 153–169. ISBN978-0-387-33505-6. Arquivado dende o orixinal(PDF) o 18 de outubro de 2012.
"Is Oral Sex Safe?". University Health Center at the University of Georgia. Arquivado dende o orixinal o 10 de outubro de 2007. Consultado o 2007-10-12.