ALHARTHI, Abdulrahman I. Simple Protocol for the Knoevenagel Condensation Under Solvent Free Conditions using Tungstophosphoric Acid as Catalyst. Asian Journal of Chemistry, [S. l.], v. 31, n. 10, p. 2181–2184, 2019. DOI: 10.14233/ajchem.2019.22072. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/31_10_8. Acesso em: 23 jul. 2024.