Preparation And In Vitro Characterisation OfMetformin Loaded Polymeric Nanoparticles ForGastroretention. Journal of Pharmaceutical Negative Results, [S. l.], p. 141–146, 2023. DOI: 10.47750/zkhpr715. Disponível em: https://pnrjournal.com/index.php/home/article/view/10798.. Acesso em: 19 jun. 2026.