Voltage and temperature dependence of the grain boundary tunneling magnetoresistance in manganitesC. Höfener, J. B. Philipp, J. Klein, L. Alff, A. Marx, B. Büchner and R. GrossEurophys. Lett., 50 5 (2000) 681-687DOI: https://doi.org/10.1209/epl/i2000-00324-1