Mara, Eugenia Ramona; Inceu, Adrian; Cuceu, Ionuţ and Achim, Monica Violeta (2009): The impact of economic crisis on the fiscal revenues. Published in: Analele Universităţii din Oradea, Seria Ştiinţe Economice (2009): pp. 252-257.
Mara, Eugenia Ramona (2011): The underground economy in Romania. Published in: Annals. Economic Science Series , Vol. XVII, (2011): pp. 1117-1123.
