@techreport{oai:tsukuba.repo.nii.ac.jp:00022655,
 author = {大澤, 義明 and OSAWA, Yoshiaki and Plastria, Frank and Tamura, Kazuki},
 month = {},
 note = {Includes bibliographical references},
 title = {Push-pull partial covering problems},
 year = {2004},
 yomi = {オオサワ, ヨシアキ}
}