%0 Journal Article %T Tri-vanadium Substituted Dawson-type Heteropolytungstate Nanocomposite (g-C 3 N 4 /Fe 3 O 4 @P 2 W 15 V 3 ) as a Novel, Green, and Recyclable Nanomagnetic Catalyst in the Synthesis of Tetrahydrobenzo[b]Pyrans %A بهروز ملکی %A Jamshidi, Ali %A سحر پیمان %A Housaindokht, Mohammad Reza %J Polycyclic Aromatic Compounds %@ 1040-6638 %D 2023