冬の増発列車のお知らせ [Details of additional winter trains] (PDF). News release (in Japanese). Japan: East Japan Railway Company. 19 October 2012. Retrieved 22 October 2012.
マリンエクスプレス踊り子運転終了 [Marine Express Odoriko operation end]. News release (in Japanese). Japan: Japan Railfan Magazine. 9 March 2020. Retrieved 14 March 2020.
"特急"サフィール踊り子"が運転を開始" [Limited express "Saphir Odoriko" starts operation]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 15 March 2020. Archived from the original on 15 March 2020. Retrieved 15 March 2020.
"特急"サフィール踊り子"が運転を開始" [Limited express "Saphir Odoriko" starts operation]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 15 March 2020. Archived from the original on 15 March 2020. Retrieved 15 March 2020.