| A newly discovered Prologue of AD 699 to the Easter Table of Victorius of Aquitaine in an unknown Sirmond manuscript | Warntjes, Immo | Article in Journal | | 2010 |
| An Irish eclipse prediction of A.D. 754: the earliest in the Latin West | Warntjes, Immo | Article in Journal | | 2014 |
| Computus and its cultural context in the Latin west, AD 300-1200. Proceedings of the 1st international conference on the science of computus in Ireland and Europe, Galway 14-16 July, 2006 | | Monograph or Collective Volume | Brepols | 2010 |
| Computus as scientific thought in Ireland and the early medieval west | Warntjes, Immo | Article in Book | | 2016 |
| Early medieval Ireland and Europe : chronology, contacts, scholarship | | Monograph or Collective Volume | Brepols | 2015 |
| Introduction: state of research on late antique and early medieval computus | Warntjes, Immo | Article in Book | | 2017 |
| Late Antique Calendrical Thought and Its reception in the Early Middle Ages: Proceedings from the Third International Conference on the Science of Computus in Ireland and Europe, Galway, 16-18 July, 2010 | | Monograph or Collective Volume | Brepols Publishers | 2017 |
| Latin and Old Irish in the Munich computus: a reassessment and further evidence | Bisagni, JacopoWarntjes, Immo | Article in Journal | | 2008 |
| Seventh-century Ireland : the cradle of medieval science? | Warntjes, Immo | Article in Book | | 2013 |
| The alteration of the Kingship of Tara 734-944 | Warntjes, Immo | Article in Journal | | 2003 |
| The early Old Irish material in the newly discovered Computus Einsidlensis (c. AD 700) | Bisagni, JacopoWarntjes, Immo | Article in Journal | | 2008 |
| The Easter Controversy of late antiquity and the early middle ages : its manuscripts, texts and tables. Proceedings of the 2nd international conference on the science of computus in Ireland and Europe. Galway, 18-20 July, 2008 | | Monograph or Collective Volume | Brepols | 2011 |
| The Munich computus : text and translation : Irish alternatives to Bede's computistics | Warntjes, Immo | Thesis | | 2007 |
| The Munich Computus : text and translation. Irish computistics between Isidore of Seville and the Venerable Bede and its reception in Carolingian times | Warntjes, Immo | Monograph or Collective Volume | Steiner | 2010 |
| The Munich Computus and the 84 (14) - year Easter reckoning | Warntjes, Immo | Article in Journal | | 2007 |
| The role of the church in early Irish regnal succession : the case of Iona | Warntjes, Immo | Article in Book | | 2010 |
| Victorius vs Dionysius : the Irish Easter controversy of AD 689 | Warntjes, Immo | Article in Book | | 2015 |