| http://blog.naver.com/leedlrnfod/memo/220983423629 | 2017-04-18 | |
| ** | https://m.facebook.com/story.php?story_fbid=1270645756355912&id=100002314980621 | 2017-04-18 |
| http://blog.naver.com/leedlrnfod/memo/220983422610 | 2017-04-18 | |
| ** | https://www.facebook.com/photo.php?fbid=397746883945900&set=a.304350136618909.1073741829.100011317743371&type=3&theater | 2017-04-18 |
| http://blog.naver.com/leedlrnfod/memo/220983420421 | 2017-04-18 |