Antalan, J. R. M., R. Tagle, A. Angel, and J. L. F. Gamurot. “An Investigation on the Edge-Gracefulness of Bubble Sort, Bubble Sort Star, and Kulli-Cycle Windmill Graphs”. Science and Technology Indonesia, vol. 11, no. 4, Sept. 2026, pp. 1735-43, doi:10.26554/sti.2026.11.4.1734-1742.