Nilsen, Dag. “A Geometrical Speculation. The Twelfth Century Roof and Some Peculiar Aspects of the Ground Plan of Værnes Church, Norway”. Acta ad archaeologiam et artium historiam pertinentia 16, no. 2 N.S. (December 4, 2017): 39–61. Accessed July 3, 2024. https://journals.uio.no/acta/article/view/5684.