L. Preite, S. Gmür, J. Imboden, E. Fischer, and N. Pfister, “Vocational education against payment: Motives and backgrounds of learners in fee-based, privately organised VET and vocational baccalaureate programmes”, SJER, vol. 47, no. 1, pp. 44–56, Apr. 2025, doi: 10.24452/sjer.47.1.4.