@phdthesis{oai:tsukuba.repo.nii.ac.jp:00039138,
 author = {岩田, 学},
 month = {},
 note = {2015},
 school = {筑波大学, University of Tsukuba},
 title = {リンクの重みの異質性と協力の進化},
 year = {2016}
}