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Fett 2018, p. 376. Fett, Denice (2018). "Diligence, secrecy and intrigue; Guido Cavalcanti and the 1559 Treaty of Cateau-Cambrésis". Diplomacy & Statecraft. 29 (3). Taylor & Francis: 372–389. doi:10.1080/09592296.2018.1491442. S2CID158367073.
Fett 2018, pp. 376–377. Fett, Denice (2018). "Diligence, secrecy and intrigue; Guido Cavalcanti and the 1559 Treaty of Cateau-Cambrésis". Diplomacy & Statecraft. 29 (3). Taylor & Francis: 372–389. doi:10.1080/09592296.2018.1491442. S2CID158367073.
Fett 2018, p. 378. Fett, Denice (2018). "Diligence, secrecy and intrigue; Guido Cavalcanti and the 1559 Treaty of Cateau-Cambrésis". Diplomacy & Statecraft. 29 (3). Taylor & Francis: 372–389. doi:10.1080/09592296.2018.1491442. S2CID158367073.
Fett 2018, p. 383. Fett, Denice (2018). "Diligence, secrecy and intrigue; Guido Cavalcanti and the 1559 Treaty of Cateau-Cambrésis". Diplomacy & Statecraft. 29 (3). Taylor & Francis: 372–389. doi:10.1080/09592296.2018.1491442. S2CID158367073.