Yi, Tog-il
Uri yoksa ui susukkekki
Kimyongsa , 2004
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Yi, Tog-il
Uri yoksa ui susukkekki
Kimyongsa , 2004
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Ju, Gang Hyeon
Uri munhwa-ui susukkekki. 1-2
Hangyere Chulphan, 2010
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Lee, Jong-ho
Hanguk 7-tae pulgasaui : kwahak yusan uro ponun uri ui choryok = Korea Seven Wonders: We look at the science of strength heritage
Yeoksaui achim, 2009
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Choe, Chun-sik
Segyein kwa hamkke ponun Han'guk munhwa kyogwaso
Sonamu, 2011
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