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Albert Jack, What Caesar Did for My Salad: Not to Mention the Earl's Sandwich, Pavlova's Meringue and Other Curious Stories Behind Our Favourite Food, 2010, ISBN1-84614-254-7, p. 141 at Google Books
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Flegr, J.; Preiss, M.; Klose, J.; Havlícek, J.; Vitáková, M.; Kodym, P. (2003). "Decreased level of psychobiological factor novelty seeking and lower intelligence in men latently infected with the protozoan parasite Toxoplasma gondii Dopamine, a missing link between schizophrenia and toxoplasmosis?". Biological Psychology. 63 (3): 253–268. doi:10.1016/S0301-0511(03)00075-9. PMID12853170. S2CID18434783.
Flegr, J.; Preiss, M.; Klose, J.; Havlícek, J.; Vitáková, M.; Kodym, P. (2003). "Decreased level of psychobiological factor novelty seeking and lower intelligence in men latently infected with the protozoan parasite Toxoplasma gondii Dopamine, a missing link between schizophrenia and toxoplasmosis?". Biological Psychology. 63 (3): 253–268. doi:10.1016/S0301-0511(03)00075-9. PMID12853170. S2CID18434783.
Flegr, J.; Preiss, M.; Klose, J.; Havlícek, J.; Vitáková, M.; Kodym, P. (2003). "Decreased level of psychobiological factor novelty seeking and lower intelligence in men latently infected with the protozoan parasite Toxoplasma gondii Dopamine, a missing link between schizophrenia and toxoplasmosis?". Biological Psychology. 63 (3): 253–268. doi:10.1016/S0301-0511(03)00075-9. PMID12853170. S2CID18434783.