Ramazani, A., Amini, I. and Massoudi, A. (2010) “Kaolinite Powder as an Efficient Catalyst for the Preparation of Coumarins from in Situ Generated Stabilized Phosphorus Ylides in Solvent-free Conditions”, Asian Journal of Chemistry, 18(1), pp. 120–124. Available at: https://asianpubs.org/index.php/ajchem/article/view/21267 (Accessed: 26 August 2024).