1.
Li, Wei Qi, Li, Jin Bo, Miao, Lian Ying, Song, Wen Yao. On r-hued coloring of planar graphs with girth at least 5. A Canadian journal of applied mathematics, computer science and statistics [Internet]. 2018 Nov. 9 [cited 2026 May 7];109. Available from: https://utilitasmathematica.com/index.php/Index/article/view/1280