Nguyen, Minh Nhat, and Duc Dung Pham. “EFFICIENT SYNTHESIS OF XANTHENE USING A DEEP EUTECTIC SOLVENT CATALYST UNDER SOLVENT-FREE”. Ho Chi Minh City University of Education Journal of Science, vol. 22, no. 9, Sept. 2025, pp. 1599-0, doi:10.54607/hcmue.js.22.9.5206(2025).