Bamoniri, A.; Mirjalili, B. B. F.; Nazemian, S. Nano-Silica Phosphoric Acid: An Efficient Catalyst for One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)-Ones (thiones) under Solvent-Free or Sonication Conditions. Iran. J. Catal. 2024, 2 (1).