B VISHWANATH PRADEEP. Psychological research about persistent depressive disorder (dysthymia). International Journal of Natural-Applied Sciences and Engineering, [S. l.], v. 3, n. 1, 2025. DOI: 10.22399/ijnasen.18. Disponível em: http://ijnasen.com/index.php/pub/article/view/18. Acesso em: 7 dec. 2025.