@phdthesis{oai:tsukuba.repo.nii.ac.jp:00020848,
 author = {阿部, 吉弘 and Abe, Yoshihiro},
 month = {},
 note = {1989},
 school = {筑波大学, University of Tsukuba},
 title = {Compact cardinals and fine filters},
 year = {1989}
}