@inproceedings{HateburHeiselSchmidt2008, author = {Hatebur, Denis and Heisel, Maritta and Schmidt, Holger}, title = {A Formal Metamodel for Problem Frames}, booktitle = {Model Driven Engineering Languages and Systems: 11th International Conference, MoDELS 2008, Toulouse, France, September 28 - October 3, 2008. Proceedings}, editor = {Krzysztof Czarnecki and Ileana Ober and Jean-Michel Bruel and Axel Uhl and Markus V{\"o}lter}, volume = {LNCS, 5301}, pages = {58 -- 82}, doi = {10.1007/978-3-540-87875-9_5}, url = {https://link.springer.com/chapter/10.1007/978-3-540-87875-9_5}, year = {2008}, }