@phdthesis{oai:waseda.repo.nii.ac.jp:00023252,
 author = {武, 博 and Wu, Bo},
 month = {},
 note = {早大学位記番号:新7034},
 school = {早稲田大学},
 title = {Analysis of Users' Social Roles in Cyberspace and Application to Information Behavior Support},
 year = {2015}
}