DJI – Three years into the pandemic: results of the longitudinal German COPSY study on youth mental health and health-related quality of life https://www.dji.de/veroeffentlichungen/literatursuche/detailansicht/literatur/33642-three-years-into-the-pandemic-results-of-the-longitudinal-german-copsy-study-on-youth-mental-health-and-health-related-quality-of-life.html?no_cache=1&print=1&cHash=adf7753a2ab107760d07e1e129dfa0ac
sv=2018-03-28&sr=b&sig=EKx2p+Nad23zZW1tLFHr7+9qNAq2pCVptAnJ855FEuk=&se=2023-06-22T07
