“SILICA SUPPORTED PERCHLORIC ACID (HCLO4-SIO2) AS ECOFRIENDLY REUSABLE CATALYSTS FOR GREEN SYNTHESIS OF TETRAHYDROBENZO[B]PYRAN DERIVATIVES BY GRINDING METHOD” (2022) International Journal of Food and Nutritional Sciences, 11(12), pp. 3348–3353. Available at: http://www.ijfans.org/index.php/Journal/article/view/13213 (Accessed: 24 August 2026).