Jus exclusivae (English Wikipedia)

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Petruccelli della Gattina, Ferdinando (1866). Histoire diplomatique des conclaves (in French). Brussels: A. Lacrois, Verboeckhoven & Co. p. 68. Retrieved 28 November 2017.
Burkle-Young, Francis A. (2000). Papal Elections in the Age of Transition, 1878-1922. Lexington Books. p. 22. ISBN 9780739101148. Retrieved 30 November 2017.
Pennington, Arthur Robert (1897). The Papal Conclaves. New York: E. & J.B. Young & Co. p. 37. Retrieved 30 November 2017.
Burkle-Young, Francis A. (2000). Papal Elections in the Age of Transition, 1878-1922. Lexington Books. p. 160. ISBN 9780739101148. Retrieved 30 November 2017.

fiu.edu (Global: 2,720^th place; English: 2,452^nd place)

Salvador Miranda. "Gaisruck, Karl Kajetan von". Archived from the original on 5 March 2016. Retrieved 16 November 2017.

Ott, M. (1911). "Pope Pius IX". Catholic Encyclopedia. Robert Appleton Company. Retrieved 16 November 2017.

"Career of Pius and his Policy" (PDF). The New York Times. 20 August 1914. Retrieved 23 July 2018.
Hofmann, Paul (22 June 1963). "Rome Believes New Pope Will Press for Reforms" (PDF). The New York Times. Retrieved 17 November 2017.

Pirie, Valérie (1935). "Pius IX (Mastai-Ferretti)". The Triple Crown: An Account of the Papal Conclaves. London: Sidgwick & Jackson. p. 328. Retrieved 16 November 2017.

Salvador Miranda. "Gaisruck, Karl Kajetan von". Archived from the original on 5 March 2016. Retrieved 16 November 2017.