@article{oai:obihiro.repo.nii.ac.jp:00002194,
 author = {Tsuruga, Akio},
 issue = {4},
 journal = {帯広畜産大学学術研究報告. 第I部, Research bulletin of Obihiro Zootechnical University. Series I},
 month = {Aug},
 note = {application/pdf},
 pages = {373--375},
 title = {Comparison of N-functions},
 volume = {12},
 year = {1982}
}