[1] 蝦夷 - Wikipedia ( (2013-10-25 23:32:24 +09:00 版)) http://ja.wikipedia.org/wiki/%E8%9D%A6%E5%A4%B7

[2] 蝦夷征討 - Wikipedia (2018-11-04 12:43:15 +09:00) https://ja.wikipedia.org/wiki/%E8%9D%A6%E5%A4%B7%E5%BE%81%E8%A8%8E

[3] 蝦夷(えぞ) - Uyopedia, 2019-07-21T07:36:29.000Z, 2022-07-12T05:07:13.425Z http://uyopedia.a.freewiki.in/index.php/%E8%9D%A6%E5%A4%B7%EF%BC%88%E3%81%88%E3%81%9E%EF%BC%89