| Gwyn Jones |
The Life of Gudmund the Good, bishop of Holar, by G. Turville-Petre, E. S. Olszewska |
|
13/, p. 67 |
| Rory McTurk |
Árna saga biskups. (Stofnun Árna Magnússonar á Íslandi 2), by porleifur Hauksson |
|
|
| Gwyn Jones |
The Age of the Sturlungs, Icelandic civilization in the thirteenth century, by Einar Ól. Sveinsson, Jóhann S. Hannesson |
|
25/2, p. 119 |