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, [S. l.], v. 22, n. 9, p. 7432–7434, 2010. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/12001. Acesso em: 4 jul. 2024.