Energies and transition rates for Be-like ions (Xe LI - Ce LV) Fatma El-Sayed, Manal Khered and S. M. Attia Eur. Phys. J. Plus, 130 6 (2015) 104 Published online: 02 June 2015 DOI: 10.1140/epjp/i2015-15104-7