1.
Gürbüz A, Belli E, Bedir F. An investigation into the effects of levels of loneliness and optimism among students at the faculty of sports sciences. JPEH [Internet]. 2019Dec.31 [cited 2024Nov.24];8(14):5-10. Available from: https://jpeh.po.opole.pl/index.php/jpeh/article/view/2