Li, Y. et al. 2026. Beyond Retraining: Training-Free Unknown Class Filtering for Source-Free Open Set Domain Adaptation of Vision–Language Models. Proceedings of the AAAI Conference on Artificial Intelligence. 40, 28 (Mar. 2026), 23265–23273. DOI:https://doi.org/10.1609/aaai.v40i28.39495.