ChemInform Abstract: Fe3O4 Nanoparticles as an Efficient and Magnetically Recoverable Catalyst for Friedel—Crafts Acylation Reaction in Solvent‐Free Conditions. Issue 31 (11th July 2013) - Hoseini, S. Jafar; Nasrabadi, Hasan; Azizi, Mahboobeh; Beni, Alireza Salimi; Khalifeh, Reza