Popoviciu, Ioan, and Salomea A. Popoviciu. “Social Entrepreneurship, Social Enterprise and the Principles of a Community of Practice”. Revista de Cercetare Si Interventie Sociala, vol. 33, June 2011, pp. 44-55, https://www.rcis.ro/journal/article/view/348-social-entrepreneurship-social-enterprise-and-the.