@article {LPHN2015, title = {Applying graph-based data mining concepts to the educational sphere,}, journal = {Proceedings of the 16th International Conference on Computer Systemsm and Technologies, Dublin, Ireland, ACM New York, NY, USA {\v S}2015, June 25 - 26, 2015}, year = {2015}, pages = {358{\textendash}365}, issn = {978-1-4503-3357-3}, doi = {10.1145/2812428.2812436}, author = {Andr{\'a}s London and {\'A}ron Pelyhe and Csaba Holl{\'o} and Tam{\'a}s N{\'e}meth} }