@article{oai:ynu.repo.nii.ac.jp:00006905,
 author = {Kubo, Yoshiko},
 issue = {1},
 journal = {Yokohama Mathematical Journal = 横濱市立大學紀要. D部門, 数学},
 month = {},
 note = {application/pdf},
 pages = {73--79},
 title = {Busemann functions on Alexandrov surfaces},
 volume = {44},
 year = {1997}
}