HAFEZ, M. E.; MAI THI, T.-T.; MAI, V.-T.; DO, T.-T.; DANG THI, T.-H.; PHAM, P.-U.; VU THI, H.-Y.; LE, Q.-M.; NGUYEN, T.-D. Stepwise grafting polyethyleneimine onto silica surface for Cu(II) removal. HPU2 Journal of Science: Natural Sciences and Technology, [S. l.], v. 3, n. 3, p. 20–26, 2024. DOI: 10.56764/hpu2.jos.2024.3.3.20-26. Disponível em: http://sj.hpu2.edu.vn/index.php/journal/article/view/259. Acesso em: 7 jan. 2025.