@techreport{oai:tsukuba.repo.nii.ac.jp:00024387,
 author = {SUKEGAWA, Noriyoshi and YAMAMOTO, Yoshitsugu and 山本, 芳嗣 and ZHANG, Liyuan},
 month = {May},
 title = {Lagrangian Relaxation and Pegging Test for Linear Ordering Problems},
 year = {2011}
}