shakir, ishraq ahmed. “Stopping Power ,Z_1^3- Parameter, Bloch and Shell Corrections in Bethe Formula for Protons and Helium Ions in DNA and Liquid Water”. Al-Mustansiriyah Journal of Science, vol. 29, no. 1, Oct. 2018, pp. 155-9, https://doi.org/10.23851/mjs.v29i1.88.