"千歳線・室蘭本線の711系による定期運用が終了" [Periodic operation of the 711 series on the Chitose Line and Muroran Main Line ends.]. Japan Railfan Magazine Online (in Japanese). 27 October 2012. Archived from the original on 14 June 2021. Retrieved 18 August 2022.
trafficnews.jp
"JR室蘭本線に新型737系導入 北海道初「通勤形ワンマン電車」 23年春運行開始" [JR Hokkaido to introduce new 737 series commuter trains on JR Muroran Line from spring 2023]. Traffic News (in Japanese). Japan: Mediavague Co., Ltd. Archived from the original on 17 August 2022. Retrieved 2022-08-17.
web.archive.org
"千歳線・室蘭本線の711系による定期運用が終了" [Periodic operation of the 711 series on the Chitose Line and Muroran Main Line ends.]. Japan Railfan Magazine Online (in Japanese). 27 October 2012. Archived from the original on 14 June 2021. Retrieved 18 August 2022.
"JR室蘭本線に新型737系導入 北海道初「通勤形ワンマン電車」 23年春運行開始" [JR Hokkaido to introduce new 737 series commuter trains on JR Muroran Line from spring 2023]. Traffic News (in Japanese). Japan: Mediavague Co., Ltd. Archived from the original on 17 August 2022. Retrieved 2022-08-17.