Ramazani, A., Amini, I. and Massoudi, A. (2010) “Bentonite Powder Catalyzed Synthesis of Coumarins from in situ Generated Stabilized Phosphorus Ylides in Solvent-free Conditions”, Asian Journal of Chemistry, 18(1), pp. 698–700. Available at: https://asianpubs.org/index.php/ajchem/article/view/21430 (Accessed: 3 October 2024).