Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) RAFIEE Ezzat and EAVANI Sara and MALAEKEH-NIKOUEI Bizhan,12-Tungstophosphoric Acid Immobilized on γ-Fe_2O_3@SiO_2 Core-Shell Nanoparticles : An Effective Solid Acid Catalyst for the Synthesis of Indole Derivatives in Water,Chemistry letters,03667022,,2012-04-05,41,4,438-440,https://cir.nii.ac.jp/crid/1570291225839201408,