JIN, T.-S., ZHAO, R.-Q. and LI, T.-S. (2010) “An Efficient and Convenient Procedure for Preparation of 5-Arylidene Barbituric Acid Catalyzed by ZrO2/SO42- Solid Superacid with Grinding”, Asian Journal of Chemistry, 19(5), pp. 3815–3820. Available at: https://asianpubs.org/index.php/ajchem/article/view/13284 (Accessed: 3 October 2024).