==Bibliography==*http://www.asan.go.kr/eng/art/sub_04_08_03.asp*Woong-jin Wee-in-jun-gi #19 Kim Okgyun by Baek Suk-gi.
* http://www.asan.go.kr/eng/art/sub_04_08_03.asp* Woong-jin Wee-in-jun-gi #19 Kim Okgyun by Baek Suk-gi.