Nonlinear properties of ferromagnetic La1-xCaxMnO3 single crystals V. Markovich, Y. Yuzhelevski, G. Gorodetsky, G. Jung, C. J. van der Beek and Ya. M. Mukovskii Eur. Phys. J. B, 35 3 (2003) 295-300 Published online: 15 October 2003 DOI: 10.1140/epjb/e2003-00280-6