Probst, A., M. Ebner, M. Schön, and D. Gerhard. “PDM Field Study in Collaborative Engineering Education – Results from 2016/17”. International Journal of Online and Biomedical Engineering (iJOE), vol. 15, no. 04, Feb. 2019, pp. pp. 127-141, doi:10.3991/ijoe.v15i04.9753.