Montazeri, N. “Sulfuric Acid Impregnated on Silica Gel (H2SO4 SiO2): A Versatile and Reusable Catalyst for the Synthesis of 1,2,4-Triazolo[5,1-b][1,3]thiazin-7-Ones”. Asian Journal of Chemistry 22, no. 9 (July 10, 2010): 7432–7434. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/12001.