@article{,
address  = {},
author = {Halvorsen, Eyvind Fjeld},
journal = {Ringerike},
keywords = {Mittelalter},
pages = {41-49},
title={Ringerikes historie i middelalderen},
uniqueid = {1565288},
url = {http://opac.regesta-imperii.de/id/1565288},
year = {1984}
}