Morris, Christopher, Martin Ritzert, Matthias Fey, William L. Hamilton, Jan Eric Lenssen, Gaurav Rattan, and Martin Grohe. 2019. “Weisfeiler and Leman Go Neural: Higher-Order Graph Neural Networks”. Proceedings of the AAAI Conference on Artificial Intelligence 33 (01):4602-9. https://doi.org/10.1609/aaai.v33i01.33014602.