@article{Qvortrup_1994, title={Niklas Luhmann: Sociale systemer. Grundrids til en almen teori}, volume={10}, url={https://tidsskrift.dk/mediekultur/article/view/1017}, DOI={10.7146/mediekultur.v10i22.1017}, number={22}, journal={MedieKultur: Journal of media and communication research}, author={Qvortrup, Lars}, year={1994}, month={Sep.}, pages={2 pages} }