@article{oai:u-ryukyu.repo.nii.ac.jp:02000769,
 author = {Maehara, Hiroshi and Tokushige, Norihide},
 journal = {Ryukyu mathematical journal},
 month = {Dec},
 note = {紀要論文},
 pages = {15--24},
 title = {On a special arrangement of spheres},
 volume = {19},
 year = {2006}
}