Müller, Florian H.; Thomas, Almut E.; Carmignola, Matteo; Dittrich, Ann-Kathrin; Eckes, Alexander; Großmann, Nadine ; Martinek, Daniela; Wilde, Matthias ; Bieg, Sonja: University students’ basic psychological needs, motivation, and vitality before and during COVID-19: A self-determination theory approach. In: Frontiers in Psychology. Jg.12. 2021