Increasing The Order Of Accuracy For One Nonlocal Boundary Value Problem. Journal of Pharmaceutical Negative Results, [S. l.], p. 968–978, 2023. DOI: 10.47750/pnr.2023.14.S02.116. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/6879.. Acesso em: 3 jun. 2026.