| A military assessment of Sarsfield | O'Brien, B. | Article in Journal | | 1970 |
| Brian Boru and Bealach Leachta | O'Brien, B. | Article in Journal | | 1991 |
| Collins barracks, Cork | O'Brien, B. | Article in Journal | | 1965 |
| Dermot MacMurrough, 1110-71 | O'Brien, B. | Article in Journal | | 1972 |
| Early metal mining and its impact on the Irish landscape | O'Brien, B. | Article in Book | | 1996 |
| Elizabeth fort, Cork | McNamara, T. F.Mulcahy, MichaelO'Brien, B. | Article in Journal | | 1959 |
| Macroom castle and estate once owned by Judge Bernard | O'Brien, B. | Article in Journal | | 1993 |
| Munster at war | O'Brien, B. | Monograph or Collective Volume | Mercier Press | 1971 |
| Owen Roe O'Neill (1582-1649) | O'Brien, B. | Article in Journal | | 1971 |
| Portraits in leadership | O'Brien, B. | Monograph or Collective Volume | Eigse na Mainistreach | 1980 |
| Red Hugh O'Donnell the soldier | O'Brien, B. | Article in Journal | | 1971 |
| Society of St. Vincent de Paul : conference of St. Columba 1903-2003 | Gilmartin, BrianO'Brien, B. | Monograph or Collective Volume | Society of St. Vincent de Paul | 2003 |
| The battle of Knockanuss | O'Brien, B. | Article in Journal | | 1968 |
| The battle of Liscarroll - 3rd September 1642 | O'Brien, B. | Article in Journal | | 2001 |
| The generalship of Brian Boru | O'Brien, B. | Article in Journal | | 1970 |
| The origins and development of the Cadet School | O'Brien, B. | Article in Journal | | 1979 |