@article{oai:tsukuba.repo.nii.ac.jp:00015927,
 author = {Tanno, Shukichi},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {99--105},
 title = {Some metrics on a (4r+3)-sphere and spectra},
 volume = {4},
 year = {1980}
}