@ARTICLE{Przepiorka_Aneta_Polish_2015,
 author={Przepiorka, Aneta and Błachnio, Agata},
 number={No 2},
 journal={Polish Psychological Bulletin},
 howpublished={online},
 year={2015},
 publisher={Committee for Psychological Science PAS},
 title={Polish Students Are Feeling Better and Better. A Research Report},
 URL={http://journals.pan.pl/Content/99866/PDF/07.pdf},
 doi={10.1515/ppb-2015-0028},
}