Martensitic transition and inverse magnetocaloric effect in Co doping Ni–Mn–Sn Heulser alloy C. Jing, Z. Li, H. L. Zhang, J. P. Chen, Y. F. Qiao, S. X. Cao and J. C. Zhang Eur. Phys. J. B, 67 2 (2009) 193-196 Published online: 22 January 2009 DOI: 10.1140/epjb/e2009-00023-9