JIN, T.-S., QI, N., LI, M., HAN, L.-S., LIU, L.-B., & LI, T.-S. (2010). One-pot Synthesis of 9-Aryl-1,8-dioxo-1,2,3,4,6,7,8- octahydroxanthenes Catalyzed by p-Dodecylbenzene Sulfonic Acid in Aqueous Media. Asian Journal of Chemistry, 19(5), 3803–3809. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/13282