@article{Ulsig_Kjær Sørensen_1985, title={OM BEGREBET BOL}, volume={14}, url={https://tidsskrift.dk/historisktidsskrift/article/view/52722}, journal={Historisk Tidsskrift}, author={Ulsig, Erik and Kjær Sørensen, Axel}, year={1985}, month={jan.} }