@article{oai:barrel.repo.nii.ac.jp:00000064,
 author = {Ishii, Toshimasa and Nagamochi, Hiroshi and Ibaraki, Toshihide},
 issue = {3},
 journal = {Networks},
 month = {Mar},
 pages = {144--155},
 title = {Multigraph augmentation under biconnectivity and general edge-connectivity requirements},
 volume = {37},
 year = {2001}
}