Forough. Sepehr, Sadegh. Allameh, Abolghasem. Davoodnia, “ Synthesis of Tetrahydrobenzo[b]pyran Derivatives Using H2WO4/ Fe3O4 Magnetic NanocatalystNowaday, the application of environmentally friendly catalysts has been interested in the synthesis of many heterocyclic compounds. Using these catalysts, reactions ”, Annals of RSCB, pp. 19067–19072, Jul. 2021.