M. E, J. Castillo, F. Bedo, a., J. E, and R. A, “Dependence of the mechanical and electrical properties on the acid content in PVA+H$_{3}$PO$_{2}$+H$_2$O membranes”, Rev. Mex. Fís., vol. 60, no. 3 May-Jun, pp. 249–0, Jan. 2014.