Shao, M. et al. 2026. vMFCoOp: Towards Equilibrium on a Unified Hyperspherical Manifold for Prompting Biomedical VLMs. Proceedings of the AAAI Conference on Artificial Intelligence. 40, 11 (Mar. 2026), 8851–8859. DOI:https://doi.org/10.1609/aaai.v40i11.37839.