@article{oai:tsukuba.repo.nii.ac.jp:00039405,
 author = {KAMIBEPPU, Akira},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {},
 pages = {307--314},
 title = {Homotopy Type of the Box Complexes of Graphs without 4-cycles},
 volume = {32},
 year = {2008}
}