Ricky Aurelius Nurtanto Diaz, I Ketut Gede Darma Putra, Made Sudarma, I Made Sukarsa, and Naser Jawas, “Comparison of Gain Ratio and Chi-Square Feature Selection Methods in Improving SVM Performance on IDS”, LKJITI, vol. 15, no. 01, pp. 64–74, Oct. 2025.