They Were Eleven (English Wikipedia)

11人いる！―SFロマン傑作選 (小学館文庫 712) (in Japanese). Shogakukan. ASIN 4091907121.
11人いる！ (続) (小学館文庫 714) (in Japanese). Shogakukan. ASIN 4091907148.
"Amazon.co.jp" 11人いる！[DVD]. Amazon Japan (in Japanese). February 24, 2006. Retrieved November 10, 2019.

animenewsnetwork.com

Loo, Egan (November 5, 2012). "Moto Hagio's They Were Eleven Sequel Gets Stage Play". Anime News Network. Retrieved June 27, 2018.
Garrity, Shaenon K. (April 11, 2013). "Jason Thompson's House of 1000 Manga Special Guest Edition: Love Song and Four Shojo Stories". Anime News Network. Retrieved November 10, 2019.
Hazra, Adriana (March 27, 2021). "Denpa Licenses Moto Hagio's They Were Eleven Manga". Anime News Network. Retrieved April 2, 2021.
Ressler, Karen (April 16, 2016). "Morning Musume Idols Star in Stage Play of Moto Hagio's They Were Eleven Sequel". Anime News Network. Retrieved November 10, 2019.
Sevakis, Justin (February 14, 2008). "Buried Treasure – They Were 11". Anime News Network. Retrieved November 10, 2019.
Macdonald, Christopher (October 20, 2003). "January CPM Releases". Anime News Network. Retrieved November 10, 2019.
Macdonald, Christopher (August 9, 2004). "Discontinued CPM Titles". Anime News Network. Retrieved November 10, 2019.
Loo, Egan (June 8, 2009). "Central Park Media's Licenses Offered by Liquidator". Anime News Network. Retrieved November 10, 2019.

"Axle official website" アクサル第3回公演「11人いる！」. Axel's Official Website (in Japanese). Retrieved November 10, 2019.
"Axle official website" アクサル第9回公演「11人いる！」. Axel's Official Website (in Japanese). Retrieved November 10, 2019.

11人いる！. Media Arts Database (in Japanese). Agency for Cultural Affairs. Retrieved April 2, 2021.
11人いる！ 1. Media Arts Database (in Japanese). Agency for Cultural Affairs. Retrieved April 2, 2021.
続・11人いる！. Media Arts Database (in Japanese). Agency for Cultural Affairs. Retrieved April 2, 2021.
東の地平西の永遠 1. Media Arts Database (in Japanese). Agency for Cultural Affairs. Retrieved April 2, 2021.
11人いる！ (アニメーション). Media Arts Database (in Japanese). Agency for Cultural Affairs. Retrieved April 2, 2021.

"¿Quién es el 11º pasajero? de Moto Hagio". Ediciones Tomodomo (in Spanish). Retrieved November 26, 2019.

ドラマＣＤ『 11人いる！』. eigeki.jp/estar (in Japanese). Retrieved November 10, 2019.
『11人いる！』キャストインタビュー. eigeki.jp/estar (in Japanese). September 6, 2013. Retrieved November 10, 2019.

萩尾望都 11人いる！：萩尾望都作品目録. Moto Hagio Works Library (in Japanese). Retrieved November 10, 2019.
萩尾望都続・11人いる！―東の地平・西の永遠：萩尾望都作品目録. Moto Hagio Works Library (in Japanese). Retrieved November 10, 2019.
映像化・舞台化作品 11人いる！. Moto Hagio Works Library (in Japanese). Retrieved November 10, 2019.

11人いる！. Digital Daijisen Plus (in Japanese). Shogakukan. Retrieved December 21, 2019 – via Kotobank.

"Było ich jedenaścioro". mangarden.pl (in Polish). Retrieved November 26, 2019.

11人いる！ 1. Shogakukan (in Japanese). Retrieved April 2, 2021.
萩尾望都パーフェクトセレクション3：11人いる！. Shogakukan (in Japanese). August 24, 2007. Archived from the original on February 25, 2021. Retrieved April 2, 2021.
萩尾望都スペースワンダー：11人いる！復刻版. Shogakukan (in Japanese). March 26, 2019. Retrieved April 2, 2021.
小学館漫画賞：歴代受賞者. Shogakukan (in Japanese). Retrieved November 10, 2019.

『11人いる！』舞台化決定. Monthly Flowers (in Japanese). Archived from the original on November 28, 2010. Retrieved November 10, 2019.

萩尾望都パーフェクトセレクション3：11人いる！. Shogakukan (in Japanese). August 24, 2007. Archived from the original on February 25, 2021. Retrieved April 2, 2021.
Thorn, Rachel (2005). "The Moto Hagio Interview". The Comics Journal (269). Seattle: Fantagraphics Books. Archived from the original on January 13, 2016.
『11人いる！』舞台化決定. Monthly Flowers (in Japanese). Archived from the original on November 28, 2010. Retrieved November 10, 2019.

【1970～80年代】ベツコミ作品年表. eBookJapan (in Japanese). Yahoo! Japan. Retrieved November 10, 2019.