@inproceedings {6212, title = {Towards Efficient Evaluation of Rule-based Permissions for Fine-grained Access Control in Collaborative Modeling}, booktitle = {2nd International Workshop on Collaborative Modelling in MDE}, year = {2017}, month = {09/2017}, address = {Austin, Texas, USA}, author = {G{\'a}bor Bergmann and Debreceni, Csaba and Istv{\'a}n R{\'a}th and D{\'a}niel Varr{\'o}} }