[1.] Explicit statements; [2.] Liturgical allusions; [3.] Allusions in private prayers; [4.] Conclusion. Though not Irish in origin, argues that the use of the formulation thought, word, deed in exegetical, liturgical, devotional and penitential literature from the second half of the seventh century onwards was due to Irish inspirarion.
Édouard Bachellery, in ÉtC 17 (1980), pp. 328-333.