@article{oai:obihiro.repo.nii.ac.jp:00000654,
 author = {Nakama, Sakina and Yanagawa, Hisashi and 柳川, 久},
 issue = {3},
 journal = {Mammal Study},
 month = {},
 note = {application/pdf},
 pages = {161--164},
 title = {Characteristics of tree cavities used by Pteromys volans orii in winter},
 volume = {34},
 year = {2009}
}