September 1045 A.D. Benedict IX Dies—Rome’s 145th, 147th, and 150th; Deposed Twice & Restored a 3rd Time; Nephew of 2 Earlier Popes; Installed Age 12; Faces off with (Another, 46 of Them) Antipope; Excommunicated Archbishop of Milan; Leads Dissolute Life; Some Bad Associates; Allegedly Repents & Dies in Penitence
Mann, Horace. "Pope Benedict IX." The Catholic Encyclopedia. Vol. 2. New York: Robert Appleton Company, 1907. http://www.newadvent.org/cathen/02429a.htm. Accessed 30 Aug 2014.
The most important source for the history of the first nine popes who bore the name of Benedict is the biographies in the Liber Pontificalis, of which the most useful edition is that of Duchesne, Le Liber Pontificalis (Paris, 1886-92), and the latest that of Mommsen, Gesta Pontif. Roman. (to the end of the reign of Constantine only, Berlin, 1898). Jaffé, Regesta Pont. Rom. (2d ed., Leipzig, 1885), gives a summary of the letters of each pope and tells where they may be read at length. Modern accounts of these popes will be found in any large Church history, or history of the City of Rome. The fullest account in English of most of them is to be read in Mann, Lives of the Popes in the Early Middle Ages (London, 1902, passim).