Massri, M. Besher, Joao Pita Costa, Andrej Bauer, Marko Grobelnik, Janez Brank, and Luka Stopar. “A Global COVID-19 Observatory, Monitoring the Pandemics through Text Mining and Visualization”. Informatica 46, no. 1 (March 15, 2022). Accessed June 23, 2025. https://puffbird.ijs.si/index.php/informatica/article/view/3375.