| 2019 | First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA | 김정리 | Article |
| 2000 | First definitive spectroscopic evidence for a stable intermediate in a sulfinyl-transfer reaction: Reaction of dibenzo[1,2]oxathiin-6-oxide with sodium ethoxide in anhydrous ethanol | 엄익환 | Article |
| 2003 | First Direct Evidence for Stereospecific Olefin Epoxidation and Alkane Hydroxylation by an Oxoiron(IV) Porphyrin Complex | 남원우 | Article |
| 2004 | First Direct Evidence for Stereospecific Olefin Epoxidation and Alkane Hydroylation by Oxoiron(IV) Porphyrin Complex | 박세은 | Master's Thesis |
| 2019 | First dispersal event of a reintroduced Asiatic black bear (Ursus thibetanus) in Korea | 장이권 | Article |
| 2007 | First examples of cyano-bridged complexes based on a novel cluster anion [Re12C17(CN)6]6- | 김성진 | Article |
| 2021 | First experience of junior surgeons with laparoscopic distal gastrectomy: in view of comparison with experienced surgeons | 이윤택 | Article |
| 2015 | First hydrothermal discoveries on the Australian-Antarctic Ridge: Discharge sites, plume chemistry, and vent organisms | 원용진 | Article |
| 2016 | First identification of compound heterozygous FKRP mutations in a Korean patient with limb-girdle muscular dystrophy | 박형준 | Letter |
| 2022 | First joint observation by the underground gravitational-wave detector KAGRA with GEO 600 | 김정리 | Article |
| 2006 | First limit on WIMP cross section with low background CsI(Tℓ) crystal detector | 한인식 | Article |
| 2015 | First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass | 이현수 | Article |
| 2019 | First Measurement of the Hubble Constant from a Dark Standard Siren using the Dark Energy Survey Galaxies and the LIGO/Virgo Binary-Black-hole Merger GW170814 | 김정리 | Article |
| 2008 | First measurements of cosmic-ray nuclei at high energy with CREAM | 양종만; 박일흥; 남신우; 박재형 | Article |
| 1996 | First Order Elliptic Operators on Compact Manifolds | 김수진 | Master's Thesis |
| 2021 | First Organ Donation after Circulatory Death Following Withdrawal of Life-sustaining Treatment in Korea: A Case Report | 백승민 | Article |
| 2007 | First principles study on oxygen vacancies in SrTiO3 | 한승우 | Conference Paper |
| 2022 | First record of the complete mitochondrial genome and phylogenetic analysis of Limnodrilus hoffmeisteri Claparède, 1862 (Annelida; Clitellata; Oligochaeta) | 정종우 | Article |
| 2020 | First record of the complete mitochondrial genome of Aedes koreicus (Edwards, 1917) (Diptera: Culicidae) in South Korea | 정종우 | Article |
| 2021 | First record of the complete mitochondrial genome of the mantis shrimp, Gonodactylaceus randalli (Manning, 1978) (Stomatopoda: Gonodactylidae) | 정종우 | Article |
