Ramazani, Ali, Ali Souldozi, Farzin Marandi, and Ali Reza Kazemizadeh. “Synthesis of Coumarins from in Situ Generated Stabilized Phosphorus Ylides in the Presence of Solid Catalysts in Solvent-Free Conditions”. Asian Journal of Chemistry 17, no. 1 (March 19, 2016): 293–296. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/19764.