̼ ȭâ 17 ¾
http://neurodo.co.krα μӹڹ ã ùε Ždz ٶ 泻 åϰ ִ./մ 18
http://www.haeun.krü ٰ ĺ , ߽ ϱ 10~20 ſ Ŭ δ.û 18 ػ
http://gkent.krϴ ٰ ڸ 鼭
http://smtcorp.co.krü ٰ Ŀ ڴٰ 17 ߴ.ħ (-2~5) , ְ
http://neurodo.co.kr(10~14) ̴ ߽ ſ ũڴٰ û ߴ. ʿ ٰ
http://www.bccenter.co.krа ĺ ʹ ̴. ħ 1, õ
https://www.hi001.kr-1, -1, õ -3, 5, û 1, -2,
https://www.ground-zero.co.kr 0, -1, 뱸 2, λ 2, 6 ̴. ְ
http://www.e-bookclub.co.kr 16, õ 13, 14, õ 15, 19, û 15, 16,
https://blog.naver.com/bori45791/22083420616816, 15, 뱸 16, λ 16, 16 ̴.̼
https://blog.naver.com/jojo86487/220544112611