Nguyen, Hai, and Phuong Tran. 2019. “Ionic Liquid Supported on Magnetic Nanoparticles (-Fe2O3@SiO2-IL-ZnxCly) As the Green Catalyst for the Paal-Knorr Reaction”. Science & Technology Development Journal: Natural Sciences 2 (5), 68-75. https://doi.org/https://doi.org/10.32508/stdjns.v2i5.780.