%0 Journal Article %T Surface-grafted Europium and Erbium Complexes of the 12-Tungstosilicate Heteropolyoxometalate: A Synthetic and Structural Investigations %A Derakhshanrad, Shadi %A Mirzaei Shahrabi, Masoud %A Joel T. Mague %J Journal of the Iranian Chemical Society %@ 1735-207X %D 2019