Sulfonated-Titanomagnetite Nanoparticles as Potential and Recyclable Catalyst for the Synthesis of Dihydroquinazoline and Hexahydroquinoline Derivatives under Solvent-Free Conditio... oleh Davood Azarifar, Roshanak Asadpoor, Elham Tavacoli, Mona Bazouleh, Mehdi Jaymand