Dung, Pham, and Tai Nguyen. 2021. “Synthesis of Pyrano[3,2-C]quinoline Derivatives Using Catalyst Prepared from L-Proline and P-Toluenesulfonic Acid”. Science and Technology Development Journal - Natural Sciences 5 (3), 1275-83. https://doi.org/https://doi.org/10.32508/stdjns.v5i3.1008.