http://www.albummania.co.kr/gallery/view.asp?seq=120210&path=100426090706 (강은 흘러야) http://www.hanamana.de/hana/index.php?option=com_content&view=article&id=269:2010-05-02-22-34-42&catid=8&Itemid=15 (이자강의 교훈) http://blog.ohmynews.com/for4river/263114 (4대강의 눈물)