Aytaç, Aysun, and Ayşen Mutlu. “Double Domination Number of the Shadow (2,3)-Distance Graphs”.
Malaya Journal of Matematik
11, no. 02 (April 1, 2023): 228–238. Accessed April 7, 2025. https://www.malayajournal.org/index.php/mjm/article/view/194.