Muntaser Syed and Salahddine Krit 2026. Numbers keep the spam out: Robustness of word- and character-level SMS spam filters to obfuscation and good-word attacks. Journal of Artificial Intelligence,Machine Learning and Neural Network . 6, 2 (Oct. 2026), 73–83. DOI:https://doi.org/10.55529/jaimlnn.62.73.83.