https://www.pixiv.net/users/16699987
https://www.pixiv.net/stacc/yuyama-chika
https://pawoo.net/@yuyama_chika
https://pawoo.net/web/accounts/500581
https://yuyama-chika.fanbox.cc
https://www.pixiv.net/fanbox/creator/16699987
https://sketch.pixiv.net/@yuyama-chika
https://www.dlsite.com/books/author/=/author_id/AJ017268
https://www.dlsite.com/maniax/fsr/=/keyword_creater/"湯山チカ"
https://www.melonbooks.co.jp/search/search.php?name=湯山チカ&text_type=author
https://ec.toranoana.jp/tora_r/ec/app/catalog/list?searchActorName=湯山チカ
https://www.pixiv.net/users/23060082
https://www.pixiv.net/stacc/user_uxhy5453
https://twitter.com/___010___0
https://twitter.com/yuyamachika
https://twitter.com/intent/user?user_id=4706722970
https://twitter.com/intent/user?user_id=1338345968811405313
https://yuyamachika.fanbox.cc
http://blog.livedoor.jp/yuyama_chika/