@article{oai:tsukuba.repo.nii.ac.jp:00015066,
 author = {初貝, 安弘 and HATSUGAI, Yasuhiro},
 journal = {Journal of Physics: Condensed Matter},
 month = {Apr},
 title = {Quantized Berry Phases for a Local Characterization of Spin Liquids in Frustrated Spin Systems},
 volume = {19},
 year = {2007},
 yomi = {ハツガイ, ヤスヒロ}
}