URLs

• https://dic.nicovideo.jp/a/ツガノガク
• https://www.mangaupdates.com/author/9g6yhxb
• https://ja.wikipedia.org/wiki/ツガノガク
• https://www.animenewsnetwork.com/encyclopedia/people.php?id=57012
• https://myanimelist.net/people/2953