A. I. Popescu, „Lifelong Learning in the Knowledge Economy: Considerations on the Lifelong Learning System in Romania from a European Perspective”, rcis, vol. 37, pp. 49–76, iun. 2012, Data accesării: nov. 07, 2026. Disponibil la: https://www.rcis.ro/journal/article/view/421-lifelong-learning-in-the-knowledge-economy-considerations