Shen, Y., Y. Sun, X. Li, A. Eberhard, and A. Ernst. “Enhancing Column Generation by a Machine-Learning-Based Pricing Heuristic for Graph Coloring”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 36, no. 9, June 2022, pp. 9926-34, doi:10.1609/aaai.v36i9.21230.