The need for knowledge among students of the fourth literary grade in the subject of history. Journal of Pharmaceutical Negative Results, [S. l.], p. 206–213, 2022. DOI: 10.47750/pnr.2022.13.S01.25. Disponível em: https://mail.pnrjournal.com/index.php/home/article/view/579.. Acesso em: 9 jun. 2026.