Popescu, Alina Irina. 2012. „Lifelong Learning in the Knowledge Economy: Considerations on the Lifelong Learning System in Romania from a European Perspective”. Revista de Cercetare si Interventie Sociala 37 (iunie): 49-76. https://www.rcis.ro/journal/article/view/421-lifelong-learning-in-the-knowledge-economy-considerations.