sourcing
| Author(s) | Title | Reference | |
|---|---|---|---|
| R.I. Page | Denmark in World History, by Viggo Starcke | 34/1, p. 81 | |
| SALLY MAPSTONE | Johannes de Irlandia: 'The Meroure of Wyssdome', Books VI and VII, Scottish Text Society, 4th ser., 19, by Craig McDonald | 61/1, p. 135 |