[2] [CITE[人工言語アルカ]], [TIME[2015-11-01T14:25:46.000Z]], [TIME[2023-07-04T05:07:18.336Z]] <https://conlinguistics.org/arka/>

[1] [CITE@ja[[[アルカ]] (人工言語) - Tanukipedia (タヌキペディア)]], [TIME[2023-07-04T00:02:24.000Z]], [TIME[2023-07-04T05:04:12.988Z]] <https://tanukipedia.miraheze.org/wiki/%E3%82%A2%E3%83%AB%E3%82%AB_(%E4%BA%BA%E5%B7%A5%E8%A8%80%E8%AA%9E)>

[3] [CITE@ja[まぼろしがたり: 記号の変遷]], [TIME[2025-05-31T13:23:57.000Z]], [TIME[2025-09-05T08:51:21.047Z]] <http://titlilgas.blogspot.com/2016/08/blog-post_8.html>

[4] [CITE@en[にしき的フォント(UCSUR) 幻字入力]], [TIME[2024-09-07T09:05:00.000Z]], [TIME[2025-09-05T08:53:26.125Z]] <https://arxidia.another.jp/arka-ucsur-convert/>