| Crean Brush vs. Ethan Allen : a winner's tale | Coyle, Eugene A.Duffy, John J. | Article in Journal | | 2002 |
| Ethan Allen's Irish friends | Coyle, Eugene A.Duffy, John J. | Article in Journal | | 1995 |
| Loyalty and its rewards in eighteenth-century New England and County Down : the cousins Crane Brush | Coyle, Eugene A.Duffy, John J. | Article in Journal | | 2001 |
| The churches of Kildare and Leighlin 2000 A.D. | Duffy, John | Monograph or Collective Volume | Éditions du Signe | 2001 |
| The date and authorship of Cath fhochairte Brighite | Duffy, John Joseph | Thesis | | 1987 |