Y. Abdelaal, Magdy, Saleh O.S. Bahaffi, and Nadia H. El-Sayed. “Synthesis and Characterization of Chitosan Urea-Formaldehyde Hollow Resin for Metal Ion Removal”. Asian Journal of Chemistry 26, no. 21 (September 30, 2014): 7239–7244. Accessed July 1, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_23_33.