By comparing the citation patterns of Korean researchers in physics and mechanical engineering, this study identifies the
extent to which type of publication source (Korean non-SCI, Korean SCI, and international SCI) and type of authorship (purely
Korean authors, Korean-foreign co-authors, and foreign-Korean co-authors) influence the choice of sources cited by Korean
scientists. Koreans publishing physics or mechanical engineering papers in international SCI journals are more likely to cite
articles published in journals of the science mainstream countries (the U.S., the U.K., the Netherlands, and Germany) than
articles published in national journals, while Koreans publishing in Korean journals tend to cite articles published in national
journals. In terms of authorship, articles published in mainstream journals are more highly cited by internationally co-authored
papers than Korean-authored papers in both disciplines.