Markos, V., Z. Kocsis, and Ágnes R. Dusa. “Different Forms of Civil Activity and Employment in Hungary and Abroad, and the Development of Student Drop-Out”. Central European Journal of Educational Research, Vol. 1, no. 1., Oct. 2019, pp. 41-54, https://ojs.lib.unideb.hu/CEJER/article/view/3342.