%0 Journal Article %T Polystyrene@graphene oxide-Fe3O4 as a novel and magnetically recyclable nanocatalyst for the efficient multi-component synthesis of spiro indene derivatives %A Seyedeh Fatemeh Hojati %A Amiri, Amirhassan %A Maryam Mahamed %J Research on Chemical Intermediates %@ 0922-6168 %D 2019