Vintilă, Georgeta, Mihaela Onofrei, and Ştefan Cristian Gherghina. “Multidimensional Data Analysis towards Assessing the European Education Systems”. European Journal of Sustainable Development 6, no. 2 (June 1, 2017): 69. Accessed April 29, 2024. http://ojs.ecsdev.org/index.php/ejsd/article/view/470.