KELLER, Tamás; KISS, Hubert János. How Socioeconomic Status Differences Observable in Students’ Delay of Gratification Evolved Over the Period of COVID-19-induced Online Education. Periodica Polytechnica Social and Management Sciences, [S. l.], v. 34, n. 1, p. 24–32, 2026. 10.3311/PPso.21893. Disponível em: https://pp.bme.hu/so/article/view/21893. Acesso em: 7 sep. 2026.