Gust, M. “Consequences and Influences of the Economic Crisis on the Efficiency of Romanian Enterprises”. Studia Universitatis Vasile Goldiș Arad, Seria Științe Economice, Vol. 24, no. 3, Sept. 2014, pp. 37-46, https://publicatii.uvvg.ro/index.php/studiaeconomia/article/view/265.