Saeda, Setsuko (1 May 2010). "恋愛弱者の男たち、「毒男」「孤男」「喪男」って実際どうなの？" [What's the truth behind "dokuo" and "moo" guys left behind in the love race?]. Peachy News (in Japanese). Japan: Line Corporation. Retrieved 17 May 2014.
netyougo.com
"毒男" [Dokuo]. ネット用語の辞典サイト「ネット王子」 (in Japanese). Japan: Netyougo. 15 November 2011. Retrieved 17 May 2014.
