Poole-Frenkel conduction in Al/ZrO2/SiO2/Si structuresP. V. Aleskandrova, V. K. Gueorguiev, Tz. E. Ivanov and J. B. KoprinarovaEur. Phys. J. B, 52 4 (2006) 453-457DOI: https://doi.org/10.1140/epjb/e2006-00335-2