Romdhini, M. U., A. Nawawi, F. Al-Sharqi, and A. Al-Quran. “On Spectrum and Energy of Non-Commuting Graph for Group U_{6n}”. Journal of the Indonesian Mathematical Society, vol. 31, no. 4, Nov. 2025, p. 1928, doi:10.22342/jims.v31i4.1928.