Hua, Z. et al. 2026. LPG-SAC-TCO: A Large Language Model--Policy-Guided Soft Actor-Critic Framework for Total Cost of Ownership--Optimal Energy Management of Hydrogen Fuel Cell Heavy-Duty Trucks. European Journal of AI, Computing & Informatics. 2, 3 (Jul. 2026), 1–11. DOI:https://doi.org/10.71222/3t13x215.