Colossal magnetostriction effect in HoMn2O5 I. Radulov, V. I. Nizhankovskii, V. Lovchinov, D. Dimitrov and A. Apostolov Eur. Phys. J. B, 52 3 (2006) 361-364 Published online: 07 August 2006 DOI: 10.1140/epjb/e2006-00318-3