Soliman, A.M. and El. Shafee, ezeldain 2017. AC-Impedance, Dynamic mechanical analysis and DSC investigations on poly(methyl methacrylate)–LiTf polymer electrolyte systems. JOURNAL OF ADVANCES IN PHYSICS. 13, 1 (Feb. 2017), 4618–4627. DOI:https://doi.org/10.24297/jap.v13i1.5668.