Ehimwenma, Kennedy E., Junfeng Wang, Ze Zheng, and Hongyu Zhou. “A Symbolic-Arithmetic for Teaching Double-Black Node Removal in Red-Black Trees”. Educational Dimension 7 (December 11, 2022): 112–129. Accessed April 16, 2026. https://acnsci.org/journal/index.php/ed/article/view/530.