University of Orléans
Christian Renoux, a history professor at the University of Orléans, published in French in 2001 a book-length study of the prayer and its origins, clearing up much of the confusion that had accumulated previously. The Franciscan journal "Frate Francesco" and the Vatican newspaper "L'Osservatore Romano" published articles in Italian summarizing the book's findings, and Renoux published an online abstract in English at The Franciscan Archive.