Aubrey N. Newman, David T. Johnson, P. M. Jones (1985). The Eighteenth Century Annual Bulletin of Historical Literature 69 (1), 108. doi:10.1111/j.1467-8314.1985.tb00698.
Tenace 2003, pp. 855–882. Tenace, Edward (2003), "A Strategy of Reaction: The Armadas of 1596 and 1597 and the Spanish Struggle for European Hegemony", English Historical Review, 118 (478): 855–882, doi:10.1093/ehr/118.478.855
Newman, Aubrey N.; Johnson, David T.; Jones, P. M. (1985). "The Eighteenth Century". Annual Bulletin of Historical Literature. 69 (1): 93–109. doi:10.1111/j.1467-8314.1985.tb00698.x.
Pollen, John Hungerford (1907). "Spanish Armada" . In Herbermann, Charles (ed.). Catholic Encyclopedia. Vol. 1. New York: Robert Appleton Company. "...the widespread suffering and irritation caused by the religious wars Elizabeth fomented, and the indignation caused by her religious persecution, and the execution of Mary Stuart, caused Catholics everywhere to sympathize with Spain and to regard the Armada as a crusade against the most dangerous enemy of the faith," and "Pope Sixtus V agreed to renew the excommunication of the Queen, and to grant a large subsidy to the Armada but, given the time needed for preparation and actual sailing of the fleet, would give nothing until the expedition should land in England. In this way, he eventually was saved the million crowns, and did not take any proceedings against the heretic queen."
