Comparative study of magnetic and electric field induced insulator-metal-transitions in Pr1-xCaxMnO3 filmsW. Westhäuser, S. Schramm, J. Hoffmann and C. JoossEur. Phys. J. B, 53 3 (2006) 323-331DOI: https://doi.org/10.1140/epjb/e2006-00387-2