@article{oai:ynu.repo.nii.ac.jp:00006770,
 author = {Heil, Wolfgang and Tollefson, Jeffrey L.},
 issue = {1&2},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {},
 note = {application/pdf},
 pages = {1--20},
 title = {ON NIELSEN'S THEOREM FOR 3-MANIFOLDS},
 volume = {35},
 year = {1987}
}