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Sungoh, Lee (October 26, 2021). "교외선, 실시설계 본격 착수‥ 2024년 운행 재개 '탄력'" [Gyooe Line's design development has been undertaken... planning to re-open in 2024]. Goyang Sinmun (in Korean). Goyang. Retrieved November 25, 2021.
