Lee Joon-hyun (August 24, 2021). "왁스, 26일 새 싱글 '그립고 그립다' 발매…'히트곡 메이커' 심현보와 의기투합" [Wax releases new single 'I miss you and miss you' on the 26th... 'Hit song maker' Shim Hyeon-bo and teamwork]. Ten Asia (in Korean). Naver. Retrieved August 24, 2021.
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