@article{oai:ynu.repo.nii.ac.jp:00006683,
 author = {Negami, Seiya},
 issue = {2},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {},
 note = {application/pdf},
 pages = {133--144},
 title = {IRREDUCIBLE 3-MANIFOLDS WITH NON-TRIVIAL π_2},
 volume = {29},
 year = {1981}
}