45Herity, Michael. "A Survey of the Royal Site of Cruachain in Connacht: 1. Introduction, the Monuments and Topography." The Journal of the Royal Society of Antiquaries of Ireland 113 (1983): 124.
The quotation is from The Middle Irish tract Senchas na Relec (Burial Ground Lore). Translation by George Petrie, The Ecclesiastical Architecture of Ireland, 1845. 102.