SAMOJLUK, A.; NOWAK, B.; PAPIERNIK, K. Measuring sadness index based on country statistics. Technical Sciences, [S. l.], v. 25, p. 193–203, 2023. DOI: 10.31648/ts.8571. Disponível em: https://czasopisma.uwm.edu.pl/index.php/ts/article/view/8571. Acesso em: 2 may. 2024.