Statistical properties of currents flowing through tunnel junctions
  This paper presents an overview of the statistical properties arising from the broadness of the distribution of tunnel currents in metal-insulator-metal tunnel junctions. Experimental current inhomogeneities can be modelled by a lognormal distribution and the size dependence of the tunnel current is modified at small sizes by the effect of broad distributions. 
V. Da Costa, M. Romeo and F. Bardou