@article{Holmberg_2016, title={Thirty Years Later: A Discipline of Distance Education}, volume={31}, url={https://www.ijede.ca/index.php/jde/article/view/1001}, number={2}, journal={International Journal of E-Learning & Distance Education / Revue internationale du e-learning et la formation à distance}, author={Holmberg, Börje}, year={2016}, month={Dec.} }