@article{oai:ynu.repo.nii.ac.jp:00008689,
 author = {Negami, Seiya and Sakurai, Susumu},
 issue = {2},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {Mar},
 pages = {179--188},
 title = {Distinguishing chromatic numbers of planar graphs},
 volume = {55},
 year = {2010}
}