Ongaro, Jared, and Benjamin Kikwai. “Hierarchical Curriculum Transfer for Swahili QA With mT5: SQuAD Pretraining and KenSwQuAD Extractive-to-Abstractive Refinement”. International Journal of Mathematics, Statistics, and Computer Science, vol. 4, Aug. 2026, pp. 595-07, https://doi.org/10.59543/14d9kq02.