Ullah, S., A. H. Dogar, and A. Qayyum. “ION-INDUCED SECONDARY ELECTRON EMISSION FROM 58Ni AND 60Ni: EVIDENCE OF SECONDARY ELECTRONS GENERATED BY THE RECOILING TARGET ATOMS”. The Nucleus, vol. 47, no. 3, June 2010, pp. 189-92, http://202.83.167.189/index.php/Nucleus/article/view/882.