KALBENDE, P.P.; JADHAV, N.B. K-10 Montmorillonite Catalysed Solvent Free Synthesis of Coumarins via Pechmann Condensation. International Journal of Scientific Research in Chemical Sciences, [S. l.], v. 7, n. 5, p. 15–21, 2020. Disponível em: https://ijsrcs.isroset.org/index.php/j/article/view/80. Acesso em: 5 apr. 2025.