http://www.heliam.net/One_Hundred_Poems/Poems_he_ge.html

旺文社古語辞典 第十版   松村明・山口明穗・和田利政   日本語大辞典   第二版   梅棹忠夫   監修

A Hundred Verses from Old Japan (The Hyakunin-isshu), tr. by William N. Porter, [1909], at sacred-texts.com

The Kodansha Japanese-English Dcotionary M. Shimizu, S. Narita 1976

http://jti.lib.virginia.edu/japanese/hyakunin/frames/hyakuframes.html

http://www.ogurasansou.co.jp/site/hyakunin/hyakunin.html

http://fusau.com/hyakuichi/index.html

https://dictionary.goo.ne.jp/

https://kobun.weblio.jp/