Variability-Aware Modeling of Filamentary Oxide-Based Bipolar Resistive Switching Cells Using SPICE Level Compact Models. - Christopher Bengel; Anne Siemon; Felix Cüppers; Susanne Hoffmann-Eifert; Alexander Hardtdegen; Moritz von Witzleben; Lena Hellmich; Rainer Waser; Stephan Menzel (IEEE Trans. Circuits Syst., 2020)