A.  Regoutz, Gupta, I., Serb, A., Khiat, A., Borgatti, F., Lee, T. - L., Schlueter, C., Torelli, P., Gobaut, B., Light, M., Carta, D., Pearce, S., Panaccione, G., and Prodromakis, T., ?Role and Optimization of the Active Oxide Layer in TiO2-Based RRAM?, Advanced Functional Materials, vol. 26, pp. 507-513, 2016.