You, Z. et al. 2026. How Wide and How Deep? Mitigating Over-squashing of GNNs via Channel Capacity Constrained Estimation. Proceedings of the AAAI Conference on Artificial Intelligence. 40, 33 (Mar. 2026), 27890–27898. DOI:https://doi.org/10.1609/aaai.v40i33.40012.