D.Le, Dang-Khoa, Quoc Khanh Nguyen, Thanh Hai Truong, and Hoang Viet Le. 2026. “Exciton Energy in Monolayer Titanium Trisulfide from Second-Order Perturbation Theory”. Ho Chi Minh City University of Education Journal of Science 23 (8). https://doi.org/10.54607/hcmue.js.23.8.5741(2026).