Abbaspour, Sima, and Parisa Javanmardi. “Phospho Sulfonic Acid: An Efficient Solid Acid Catalyst for the Facile Preparation of 1,4-Dihydropyridines”. Iranian Journal of Catalysis 5, no. 2 (February 3, 2024). Accessed June 11, 2026. https://oiccpress.com/ijc/article/view/3847.