Punghyun Nam: On the Relations Between Hyangchal and Kwukyel. In: Young-Key Kim-Renaud (Hg.): Theoretical Issues in Korean Linguistics. Center for the Study of Language and Information, 1994, 419—423; Insup Taylor, Martin M. Taylor: Writing and literacy in Chinese, Korean, and Japanese. John Benjamins, 1995, S. 106; Florian Coulmas: The Blackwell Encyclopedia of Writing Systems. Wiley-Blackwell, 1999, S. 273, 280; Iksop Lee, S. Robert Ramsey: The Korean Language. State University of New York Press, 2000, S. 51f.; 구결학회 [Архівовано 16 лютого 2006 у Wayback Machine.] www.kugyol.or.kr.
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Punghyun Nam: On the Relations Between Hyangchal and Kwukyel. In: Young-Key Kim-Renaud (Hg.): Theoretical Issues in Korean Linguistics. Center for the Study of Language and Information, 1994, 419—423; Insup Taylor, Martin M. Taylor: Writing and literacy in Chinese, Korean, and Japanese. John Benjamins, 1995, S. 106; Florian Coulmas: The Blackwell Encyclopedia of Writing Systems. Wiley-Blackwell, 1999, S. 273, 280; Iksop Lee, S. Robert Ramsey: The Korean Language. State University of New York Press, 2000, S. 51f.; 구결학회 [Архівовано 16 лютого 2006 у Wayback Machine.] www.kugyol.or.kr.