Virag, N. P., D. Mateș, D. Ardelean, and C. G. Feieș. “Environmental Accounting: A Management Tool for Sustainable Development”. Studia Universitatis Vasile Goldiș Arad, Seria Științe Economice, Vol. 24, no. 4, Dec. 2014, pp. 164-71, https://publicatii.uvvg.ro/index.php/studiaeconomia/article/view/261.