T. S. Longmena, O.O. Ige, G.J. Ibeh, and S.A. Jonah. “CALCULATION OF PROTON INDUCED REACTION CROSS SECTIONS OF LONG-LIVED FISSION PRODUCTS USING EMPIRE CODE”. Academy Journal of Science and Engineering, vol. 14, no. `1, Dec. 2020, pp. 122-4, https://ajse.academyjsekad.edu.ng/index.php/new-ajse/article/view/49.