For name-variants and a few biographical details (including citation to a biography published in 1963) see page 206 in: A Ziggelaar (1983), "The papal bull
doi:10.1007/s10734-004-2534-1. JSTOR 29735011. ^ James Heywood (1840). Papal Bull to the University of Cambridge. William Clowes and Sins. 45. https://archive
libraries of history”. 2016年8月19日閲覧。 ^ The Vatican's Secret Archive: selected papal documents go on display in Italy(ガーディアン) ^ a b Preston, John (1 June 2010)