Huong Ngoc Thi Dao, The Thai Nguyen, Tran Huyen Thi Nguyen, Thuy Hong Ngoc Phan, and Phuong Hoang Tran. 2024. “Preparation of Pyridinium-Based Ionic Liquid and Application As a Green Catalyst for the Synthetic Route of 4H-1-Benzopyran-5(6H)-Ones”. Vietnam Journal of Science, Technology and Engineering 66 (1):34-45. https://doi.org/10.31276/VJSTE.66(1).34-45.