@article{oai:tsukuba.repo.nii.ac.jp:00018695,
 author = {笠原, 勇二 and KASAHARA, Yuji and Watanabe, Shinzo},
 issue = {3},
 journal = {Proceedings of the Japan Academy. Ser. A, Mathematical sciences},
 month = {Mar},
 pages = {22--26},
 title = {Remarks on Krein-Kotani’s correspondence between strings and Herglotz functions},
 volume = {85},
 year = {2009},
 yomi = {カサハラ, ユウジ}
}