Electron impact excitation rate coefficients for Ni-like gadolinium T.-M. Shen, C.-Y. Chen, Y.-S. Wang and Y.-M. Zou Eur. Phys. J. D, 53 2 (2009) 179-188 Published online: 19 March 2009 DOI: 10.1140/epjd/e2009-00100-3