Cojocaru, M. and Morariu, C.N. (2006) “Resursele umane si munca la negru”, Revista de Cercetare si Interventie Sociala, 12, pp. 44–49. Available at: https://www.rcis.ro/journal/article/view/140-resursele-umane-si-munca-la-negru-3 (Accessed: 6 November 2026).