中国科学院数学与系统科学研究院期刊网
On 2-distance (△ + 4)-coloring of Planar Graphs with Girth Five
Zakir DENIZ
Acta Mathematicae Applicatae Sinica(English Series) . 2026, (2): 569 -581 .  DOI: 10.1007/s10255-025-0055-0