"[인디게임 발굴기] 흠심 메트로, 한국형 철도 시뮬레이션의 발견 - 게임인사이트" [[Indie Game Excavator] Heumshim Metro discovers Korean-style railroad simulation - Game Insights]. www.gameinsight.co.kr (in Korean). 12 July 2021. Retrieved 3 September 2021.
gamemeca.com
Mihee Kim, Game Mecca 2021.06.28 12:17. "영등포↔청량리, 서울지하철 1호선 시뮬레이터 스팀 출시" [Yeongdeungpo ↔ Cheongnyangni, Seoul Subway Line 1 Simulator Steam launch]. Game Mecca (in Korean). Retrieved 3 September 2021.{{cite web}}: CS1 maint: numeric names: authors list (link)
"1호선 시뮬레이터 흠심 메트로는 '철덕'이 만들었다" [Line 1 simulator Heumshim Metro was made by 'Cheoldeok']. www.gamemeca.com (in Korean). Retrieved 3 September 2021.
thisisgame.com
김승주 (5 July 2021). ""실제 서울 풍경 담았다" 철도만 10년 이상 파온 개발자 이야기" ["Actual Seoul scenery" The story of a developer who has worked for over 10 years in railroad]. 디스이즈게임 (in Korean). Retrieved 3 September 2021.
