Lee, Mi-Hye
Hanguko Munbob: hangmok gyoyuk yongu
Dosochul Phan Bak I Jong, 2005
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Yi, Chu-haeng
Han'gugo uijon myongsa yon'gu
Han'guk Munhwasa, 2009
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Kim Chang-sop
Hangugo hyongtaeron yongu
T'aehaksa, 2008
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An, Hwi-jun
Hanguk hoehwasa yongu
Sigongsa , 2000
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Koguryo kobun pyokhwa yongu
Sagyejol, 2000
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