Stoian, Marta, Maxim Cetulean, and Razvan Bujor. “Digital Transformation and Economic Sustainability: A Comparative Analysis of Romania, Poland and Hungary”. Journal of Academic Opinion 5, no. 2 (December 16, 2025): 82–87. Accessed December 30, 2025. http://academicopinion.org/index.php/pub/article/view/84.