Toja, Guido (1932). "Modern Tendencies and the Present State of Insurance in Italy". The Annals of the American Academy of Political and Social Science. 161: 235–250. doi:10.1177/000271623216100135. S2CID144280259.
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babel.hathitrust.org
"Note de Mr Toja". Premier Congrès International d'Actuaires, Bruxelles, 2–6 septembre 1895. 1895. pp. 292–293.
Toja, Guido (1932). "Modern Tendencies and the Present State of Insurance in Italy". The Annals of the American Academy of Political and Social Science. 161: 235–250. doi:10.1177/000271623216100135. S2CID144280259.