@article{oai:ynu.repo.nii.ac.jp:00008680,
 author = {Aishanjiang, Wusuying and Negami, Seiya and Yamamoto, Ko},
 issue = {1},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {Sep},
 pages = {71--92},
 title = {The distinfuishing numbers of 4-regular quadrangulations on the torus},
 volume = {55},
 year = {2009}
}