Zhang, M., X. Wang, M. Zhu, C. Shi, Z. Zhang, and J. Zhou. “Robust Heterogeneous Graph Neural Networks Against Adversarial Attacks”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 36, no. 4, June 2022, pp. 4363-70, doi:10.1609/aaai.v36i4.20357.