M. Z. Zainudin, J. Ponnian, N. Mohamed, and I. Sulaiman, “ENERGY-EFFICIENT 4-bit FULL ADDER DESIGN USING MODIFIED GDI TECHNIQUE IN 130nm TECHNOLOGY USING MENTOR GRAPHICS SOFTWARE”, IJIRM, vol. 13, no. 1, pp. 9–17, Apr. 2026, doi: 10.63646/NXXQ7141.