| A survey of the Vatican Archives and of its medieval holdings | Boyle, Leonard E. | Monograph or Collective Volume | Pontifical Institute of Mediaeval Studies | 1972 |
| An anti-pope's personal private prayer book | Kane, Eileen | Article in Book | | 2016 |
| England and her neighbours, 1066-1453 : essays in honour of Pierre Chaplais | | Monograph or Collective Volume | Hambledon | 1989 |
| Ireland, the papal curia and the schism : a border case | Walsh, Katherine | Article in Book | | 1980 |
| James Butler, second duke of Ormonde in Avignon | Moulinas, René | Article in Book | | 2000 |
| The Vatican Archives : with special reference to sources for British medieval history | MacFarlane, Leslie | Article in Journal | | 1959 |