Blaga, R. L., and A. Blaga. “Price Determination for Educational Services Based on the Investments in Education”. Studia Universitatis Vasile Goldiș Arad, Seria Științe Economice, Vol. 26, no. 4, Nov. 2016, pp. 78-93, https://publicatii.uvvg.ro/index.php/studiaeconomia/article/view/203.