@article{oai:ynu.repo.nii.ac.jp:00006522,
 author = {Berkowitz, H. W.},
 issue = {2},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {},
 note = {application/pdf},
 pages = {87--89},
 title = {A COUNTEREXAMPLE TO A PROOF OF HOMMA},
 volume = {19},
 year = {1971}
}