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