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DOI : https://doi.org/10.5467/JKESS.2021.42.4.412
https://www.ajol.info/index.php/rjeste/article/view/210591
https://scholar.google.com/citations?user=G-o6l5wAAAAJ&hl=en
https://orcid.org/0000-0002-7722-0031
