"최악의 친구들 / Worst Friends". Mise-en-scene Short Film Festival. Archived from the original on March 23, 2019. Retrieved October 8, 2020.
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Jang, Jin-ri (April 26, 2018). [Oh!쎈 탐구] 김수현 류준열 이제훈도...그땐 그랬지! [[Oh! Strong exploration] Kim Soo-hyun Ryu Jun-yeol Lee Je-hoon too...That was the case back then!]. OSEN (in Korean). Naver. Archived from the original on January 17, 2023. Retrieved October 8, 2020.
Jang, Jin-ri (April 26, 2018). [Oh!쎈 탐구] 김수현 류준열 이제훈도...그땐 그랬지! [[Oh! Strong exploration] Kim Soo-hyun Ryu Jun-yeol Lee Je-hoon too...That was the case back then!]. OSEN (in Korean). Naver. Archived from the original on January 17, 2023. Retrieved October 8, 2020.