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參考資料

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↑  Choi Ji-yoon. . NEWSIS via Naver. December 5, 2021  [December 5, 2021]. （原始内容存档于December 5, 2021） （韩语）.
↑  Lee Jae-hoon.  [Kep1er to debut on January 3 next year... Cancellation of '2021 MAMA' appearance]. NEWSIS via Naver. December 8, 2021  [December 8, 2021]. （原始内容存档于December 8, 2021） （韩语）.
↑   [Kep1er information on COVID-19 confirmation]. Daum. December 14, 2021  [December 14, 2021]. （原始内容存档于December 14, 2021） （韩语）.
↑  Kim, Won-kyum.  [Kep1er, Xiaoting and Mashiro recover from Corona 19 → Debut promotion resumes on January 3 [Official]]. Spotv News. November 26, 2021  [November 26, 2021]. （原始内容存档于December 26, 2021） （韩语）.
↑  Lee, Seul.  ['Girls Planet' Kepler, today (3rd) the music industry...Release of 'First Impact']. X-port News. January 3, 2022  [January 13, 2022]. （原始内容存档于January 3, 2022） –Naver （韩语）.
1 2  . Genie Music; Stone Music Entertainment. Wake One Entertainment; Swing Entertainment. January 3, 2022  [January 8, 2022]. （原始内容存档于January 8, 2022） –Melon （韩语）.
↑  Lee, Seul.  ['Girls Planet' Kep1er, today (3rd) the music industry...Release of 'First Impact']. X-port News. January 3, 2022  [January 8, 2022]. （原始内容存档于January 3, 2022） –Naver （韩语）.
↑  . Tunebat.   [January 8, 2022]. （原始内容存档于January 8, 2022）.
↑   [Week 3 of 2022 Digital Chart]. Korea Music Content Association. January 9–15, 2022  [January 20, 2022]. （原始内容存档于January 20, 2022） –Gaon Chart （韩语）.
↑   [Week 6 of 2022 Digital Chart]. Korea Music Content Association. January 30 – February 5, 2022  [February 10, 2022]. （原始内容存档于February 10, 2022） –Gaon Chart （韩语）.
↑   [Week 2 of 2022 Download Chart]. Korea Music Content Association. January 2–8, 2022  [January 13, 2022]. （原始内容存档于January 13, 2022） –Gaon Chart （韩语）.
↑  . Billboard. January 30 – February 5, 2022  [February 10, 2022]. （原始内容存档于February 4, 2022）.  含有連結內容需訂閱查看的頁面 (link)
↑  . Billboard. February 6–12, 2022  [February 10, 2022]. （原始内容存档于February 10, 2022）.  含有連結內容需訂閱查看的頁面 (link)
↑   [Billboard Japan Hot 100 [2022/01/12 Release]]. Billboard Japan.   [January 12, 2022]. （原始内容存档于January 12, 2022） （日语）.
1 2   [Billboard Japan Hot 100 [2022/01/26 Release]]. Billboard Japan.   [January 26, 2022]. （原始内容存档于January 26, 2022） （日语）.
↑   [Oricon Weekly Total Single Ranking – Published on January 17, 2022]. Oricon. January 3–9, 2022  [January 15, 2022]. （原始内容存档于January 19, 2022） （日语）.
1 2   [Oricon Weekly Total Single Ranking – Published on January 24, 2022]. Oricon. January 10–16, 2022  [January 26, 2022]. （原始内容存档于January 21, 2022） （日语）.
1 2  . Recorded Music NZ. January 10, 2022  [January 8, 2022]. （原始内容存档于January 8, 2022）.
1 2 3  . January 7–13, 2022  [January 18, 2022]. （原始内容存档于January 18, 2022）.
↑  . Recording Industry Association Singapore.   [January 11, 2022]. （原始内容存档于January 11, 2022）.
1 2  . Billboard Vietnam. January 13–20, 2022  [January 25, 2022]. （原始内容存档于January 20, 2022） （越南语）.
1 2  . Billboard. January 9–15, 2022  [January 11, 2022]. （原始内容存档于January 11, 2022）.  含有連結內容需訂閱查看的頁面 (link)
↑  . Billboard. January 16–22, 2022  [January 19, 2022]. （原始内容存档于January 19, 2022）.  含有連結內容需訂閱查看的頁面 (link)
1 2  . Billboard. January 23–29, 2022  [January 25, 2022]. （原始内容存档于January 24, 2022）.  含有連結內容需訂閱查看的頁面 (link)
↑  . Billboard. January 9–15, 2022  [January 13, 2022]. （原始内容存档于January 11, 2022）.  含有連結內容需訂閱查看的頁面 (link)
↑  . Billboard. January 16–22, 2022  [January 19, 2022]. （原始内容存档于January 19, 2022）.  含有連結內容需訂閱查看的頁面 (link)
↑  Jo, Hye-jin.  [Kep1er, 'Re-debut' Choi Yoo-jin → The same 'dream' of the first debut members [Comprehensive]]. X-port News. January 3, 2022  [January 8, 2022]. （原始内容存档于January 8, 2022） –Naver （韩语）.
↑  Lee, Seung-hoon.  ['Mubang' NCT U, 1st place with 'Universe'..Chocome・Onew comeback→Highkey・Kep1er debut [comprehensive]]. Osen. January 7, 2022  [January 8, 2022]. （原始内容存档于January 7, 2022） –Naver （韩语）.
↑  Lee, Ha-na.  ['Umjung' Ive, first place in the new year "Thank you for the dive"... Chocome comeback, Kep1er debut (comprehensive)]. Newsen. January 8, 2022  [January 8, 2022]. （原始内容存档于January 8, 2022） –Naver （韩语）.
↑  Ji, Min-kyung.  ['Inkigayo' Ive, 1st place popularity run..Aespa, Chocome, Kim Wan-sun comeback [General]]. Osen. January 9, 2022  [January 13, 2022]. （原始内容存档于January 9, 2022） –Naver （韩语）.
1 2  Kim, Bo-ra.  ['Mcar' Kepler overtakes Ive for 1st place...Minho and Hyorin comeback [Overall]]. Osen. January 13, 2022  [January 13, 2022]. （原始内容存档于January 13, 2022） –Naver （韩语）.
1 2  Lee, Seul-gi.  ['Music Bank' monster rookie Kepler beats IU to win 1st place "thanks to the fans" [General]]. My Daily. January 14, 2022  [January 14, 2022]. （原始内容存档于January 14, 2022） –Naver （韩语）.
1 2  Kim, Soo-jung.  ['Mcar' Kep1er beats the Enhypen to win 1st place..."Let's be together forever" [General]]. X-port News. January 20, 2022  [January 20, 2022]. （原始内容存档于January 20, 2022） –Naver （韩语）.
↑  . 韓國聯合通訊社. 2021-08-02  [2021-12-12]. （原始内容存档于2021-08-03）.
↑  . EBN. 2021-08-02  [2021-12-12]. （原始内容存档于2021-10-09）.
↑  . iChart. 2022-03-20  [2022-03-25]. （原始内容存档于2022-03-25）.
↑  . Billboard. February 13–19, 2022  [February 22, 2022]. （原始内容存档于February 22, 2022）.
↑   [Week 7 of 2022 Digital Chart]. Korea Music Content Association. February 6–12, 2022  [February 17, 2022]. （原始内容存档于February 17, 2022） –Gaon Chart （韩语）.
↑  . Billboard Korea. February 19, 2022  [February 15, 2022]. （原始内容存档于February 15, 2022） （韩语）.
↑  . Circle Chart.   [December 9, 2022]. （原始内容存档于2022-07-07） （韩语）.
↑  . Billboard Japan.   [December 9, 2022]. （原始内容存档于2022-12-27）.
↑  . Recording Industry Association of Japan.   [November 29, 2022] （日语）.  在下拉菜单选择“2022年10月”