@article{oai:ynu.repo.nii.ac.jp:00006748,
 author = {Ferri, Massimo and Gagliardi, Carlo},
 issue = {1&2},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {},
 note = {application/pdf, We prove some grahp-theometrical propositions and apply them to a characterization of punctured n-spheres with h boundary components, as the manifolds with vanishing regular genus and hole number equal to h.},
 pages = {29--38},
 title = {A CHARACTERIZATION OF PUNCTURED n-SPHERES},
 volume = {33},
 year = {1985}
}