@inproceedings{Illdefined2022,
	author = "Arthur Rump and Vadim Zaytsev",
	title = "{A Refined Model of Ill-definedness in Project-Based Learning}",
	booktitle = "{MoDELS'22 Companion Proceedings: Educators Symposium of the 25th International Conference on Model Driven Engineering Languages and Systems (EduSymp)}",
	year = 2022,
	editor = "Thomas K{\"u}hn and Vasco Sousa and Olivier Barais and Peter J. Clarke",
	pages = "115--122",
	doi = "10.1145/3550356.3556505",
}