Tavakoli-Hoseini, N., Heravi, M., & Bamoharram, F. (2010). Knoevenagel Condensation Reaction Using Brønsted-Acidic Ionic Liquids as Green and Reusable Catalysts. Asian Journal of Chemistry, 22(9), 7208–7212. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/11970