Jaydeep Parejiya, Patat Sarman, and Pravin Vadhel. “Planarity of a Unit Graph Part -III \(|Max (R)| \geq 3\) Case”. Malaya Journal of Matematik 8, no. 04 (October 1, 2020): 1413–1416. Accessed July 16, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1634.