Ion acoustic shock waves in a degenerate relativistic plasma with nuclei of heavy elements A. Atteya, E. E. Behery and W. F. El-Taibany Eur. Phys. J. Plus, 132 3 (2017) 109 Published online: 02 March 2017 DOI: 10.1140/epjp/i2017-11367-2