Non linear transport properties of an insulating YBCO nano-bridgeL. Fruchter, A. Yu Kasumov, J. Briatico, A. A. Ivanov and V. NicholaichikEur. Phys. J. B, 73 3 (2010) 361-365DOI: https://doi.org/10.1140/epjb/e2010-00014-9