by 鄭然植(Chung Yeon-shik)
Published in 한국학(구 정신문화연구) (1999)

by 鄭然粲(Chong Yon-ch"an)
Published in 한국학(구 정신문화연구) (1993)

by 李弼宇, Phil Woo Lee, 鄭然楫, Youn Jib Chung
Published in 목재공학(Journal of the Korean Wood Science and Technology) (30.06.1988)

by 李弼宇, Phil Woo Lee, 嚴永根, Young Geun Eom, 鄭然楫, Youn Jib Chung
Published in 목재공학(Journal of the Korean Wood Science and Technology) (30.09.1988)

by 鄭然粲(서평자)
Published in 한국학(구 정신문화연구) (1981)

by 李弼宇, Phil Woo Lee, 嚴永根, Young Geun Eom, 鄭然楫, Youn Jib Chung
Published in 목재공학(Journal of the Korean Wood Science and Technology) (30.12.1987)

by 鄭然郁(Y.W. Chung), 李秉化(B.H. Lee)
Published in Annals of surgical treatment and research (1974)

by 김정연(Jungyeon Kim)
Published in 영어학 (01.03.2024)

by 정연식
Published in Daehan yisa haghoeji (01.08.2021)

by 허정연, Jungyeon Heo
Published in 당뇨병(JKD) (30.06.2023)

by 유정연(Jungyeon Yu), 배상환(Sanghwan Bae)
Published in KIEAE Journal (01.08.2024)

by 최정연, 김광일
Published in Taehan Ŭisa Hyŏphoe chi (01.07.2024)

by 유정연(Jungyeon Yu), 배상환(Sanghwan Bae)
Published in KIEAE Journal (01.02.2024)

by 원정연
Published in KIEAE Journal, 18(6) (01.12.2018)

by 黃圭哲(K.C. Whang), 徐武昌(Moo Chang Suh), 鄭然郁(Yoon Wook Chung), 姜錫鳳(Suk Bong Kang), 朴東錫(Dong Suk Park)
Published in Annals of surgical treatment and research (1973)

by 김상수, 정연식
Published in 韓國ITS學會 論文誌 (28.02.2024)

by 남상기, 정연식
Published in 韓國ITS學會 論文誌 (30.12.2023)

by 이정연(Joung-Youn Lee)
Published in 디지털콘텐츠학회논문지 (01.04.2019)

by 이정연(Joung-Youn Lee)
Published in 디지털콘텐츠학회논문지 (2019)

by 백정연, Jung Yun Baek
Published in 당뇨병(JKD) (30.06.2021)