Gheorghe, Catalin, and Oana Panazan. “Effect of Health System Performance on Volatility During the COVID-19 Pandemic: A Neural Network Approach”. Journal of Business Economics and Management 25, no. 1 (February 28, 2024): 129–152. Accessed November 23, 2024. https://transport.vgtu.lt/index.php/JBEM/article/view/21059.