PT Unknown AU Betz, S Fritsch, A Oberweis, A TI TracyML - A Modeling Language for Social Impacts of Product Life Cycles SE Forum and Demos at ER 2017. Proceedings of the ER Forum 2017 and the ER 2017 Demo Track co-located with the 36th International Conference on Conceptual Modelling (ER 2017), Valencia, Spain, November 6-9, 2017. Ed.: C. Cabanillas, S. España, S. Farshidi PY 2017 BP 193 EP 206 VL 1979 LA english ER