Huang, H. et al. 2026. GraphCoT-VLA: A 3D Spatial-Aware Reasoning Vision-Language-Action Model for Robotic Manipulation with Ambiguous Instructions. Proceedings of the AAAI Conference on Artificial Intelligence. 40, 22 (Mar. 2026), 18324–18332. DOI:https://doi.org/10.1609/aaai.v40i22.38896.