^ “gróigeán”, in Historical Irish Corpus, 1600–1926, Royal Irish Academy
^ Mhac an Fhailigh, Éamonn (1968) The Irish of Erris, Co. Mayo: A Phonemic Study, Dublin Institute for Advanced Studies, section 130, page 31
^ Stockman, Gerard (1974) The Irish of Achill, Co. Mayo (Studies in Irish Language and Literature, Department of Celtic, Q.U.B.; vol. 2), Institute of Irish Studies, The Queen’s University of Belfast, section 1590, page 349
^ Lucas, Leslie W. (1979) Grammar of Ros Goill Irish Co. Donegal (Studies in Irish Language and Literature, Department of Celtic, Q.U.B.; vol. 5), Institute of Irish Studies, The Queen’s University of Belfast