| 'As legacie upon my soule' : the wills of the Irish Catholic community, c.1550-c.1660 | Tait, Clodagh | Article in Book | Four Courts Press | 2006 |
| Alternative establishments? Insular Catholicism and Presbyterianism | Armstrong, RobertÓ hAnnracháin, Tadhg | Article in Book | | 2013 |
| Cavan and the Presbyterian frontier in the early eighteenth century | Armstrong, Robert | Article in Book | | 2014 |
| Christianities in the early modern Celtic world | | Monograph or Collective Volume | Palgrave Macmillan | 2014 |
| Claudius Gilbert and his books | Armstrong, Robert | Article in Book | | 2013 |
| Conclusion : Celtic Christianities in the age of Reformations : language, community, tradition and belief | Armstrong, Robert | Article in Book | | 2014 |
| Establishing a confessional Ireland, 1641–1691 | Armstrong, Robert | Article in Book | | 2018 |
| Insular Christianity : alternative models of the church in Britain and Ireland, c. 1570 – c. 1700 | | Monograph or Collective Volume | Manchester University Press | 2013 |
| Intelligence, statecraft and international power; papers read before the 27th Irish Conference of Historians held at Trinity College, Dublin 19-21 May 2005 : Historical Studies XXV | | Monograph or Collective Volume | Irish Academic Press | 2006 |
| Introduction : Making and remaking community in early modern Ireland | Armstrong, Robert (Robert Matthew)Ó hAnnracháin, Tadhg | Article in Book | | 2006 |
| Ireland at Westminster : the Long Parliament's Irish committees, 1641-1647 | Armstrong, Robert (Robert Matthew) | Article in Book | | 2002 |
| Ireland's Puritan Revolution? The Emergence of Ulster Presbyterianism Reconsidered | Armstrong, Robert (Robert Matthew) | Article in Journal | | 2006 |
| Of stories and sermons : nationality and spirituality in Presbyterian Ulster in the later seventeenth century | Armstrong, Robert (Robert Matthew) | Article in Book | | 2006 |
| Ormond, the confederate peace talks and protestant royalism | Armstrong, Robert (Robert Matthew) | Article in Book | | 2001 |
| Preaching Presbyterian style : James Alexander of Convoy | Armstrong, Robert | Article in Book | | 2013 |
| Presbyterian history in Ireland : two seventeenth-century narratives | | Monograph or Collective Volume | Ulster Historical Foundation | 2016 |
| Protestant churchmen and the confederate wars | Armstrong, Robert (Robert Matthew) | Article in Book | | 2005 |
| Protestant Ireland and the English parliament, 1641-1647 | Armstrong, Robert | Thesis | | 1996 |
| Protestant war : the 'British' of Ireland and the wars of the three kingdoms | Armstrong, Robert (Robert Matthew) | Monograph or Collective Volume | Manchester University Press | 2005 |
| Telling the Presbyterian story in eighteenth-century Ireland : John McBride and James Kirkpatrick | Armstrong, Robert | Article in Book | | 2017 |
| The Irish alternative : Scottish and English Presbyterianism in Ireland | Armstrong, Robert | Article in Book | | 2013 |
| The Long Parliament goes to war : the Irish campaigns, 1641-3 | Armstrong, Robert (Robert Matthew) | Article in Journal | | 2007 |
| The War of the Three Kings, 1689-91 | Armstrong, Robert | Article in Book | | 2014 |
| Through the ages to Newtownabbey | Armstrong, Robert | Monograph or Collective Volume | Newtownabbey Borough Council | 1979 |
| Through the ages to Newtownabbey | Armstrong, Robert | Monograph or Collective Volume | Newtownabbey Borough Council | 1995 |
| Viscount Ards and the presbytery : politics and religion among the Scots of Ulster in the 1640s | Armstrong, Robert (Robert Matthew) | Article in Book | | 2009 |
| “Beasts with claws” : the English Republic, the Presbyterian peril, and the Ulster question | Armstrong, Robert | Article in Journal | | 2022 |