@article{oai:ynu.repo.nii.ac.jp:00006950,
 author = {Lee, Jaeun},
 issue = {Special},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {},
 note = {application/pdf, Enumerative research is presently a major center of interest in topological graph theory, as in the work of Archdeacon et al [2], Gross and Furst [4], Hofmeister [9]-[13] , Kwak and Lee [20]-[24], Mizuno and Sato [25]-[28] and [32], Mohar [29], Mull, Rieper and White [30], Negami [31], etc. In this paper, we survey some results on the enumeration of graph coverings and introduce some unsolved problems.},
 pages = {101--111},
 title = {ENUMERATION OF GRAPH COVERINGS},
 volume = {47},
 year = {1999}
}