@article{oai:fun.repo.nii.ac.jp:00005035,
 author = {Nacher, Jose and Ueda, N. and Yamada, T. and Kanehisa, M. and Akutsu, T.},
 issue = {207},
 journal = {BMC Bioinformatics},
 month = {Dec},
 pages = {1--16},
 title = {Clustering under the line graph transformation: Application to enzymes network},
 volume = {5},
 year = {2004}
}