Cropper, Andrew, Rolf Morel, and Stephen H. Muggleton. “Learning Higher-Order Programs through Predicate Invention”. Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 09 (April 3, 2020): 13655-13658. Accessed September 21, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/7113.