Ordyniak, Sebastian, and Stefan Szeider. “Parameterized Complexity of Small Decision Tree Learning”. Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 7 (May 18, 2021): 6454–6462. Accessed May 25, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/16800.