http://www.icaphila.org/exhibitions/washburn.php
http://imomus.livejournal.com/309161.html
http://echostudiochicago.com/learn/patrick-blancs-vertical-gardens
http://lord-whimsy.livejournal.com/208509.html
http://lord-whimsy.livejournal.com/tag/organicism
http://www.heavypetal.ca/archives/2007/03/a_brief_history_of_seedballs.html
http://www.pathtofreedom.com/pathproject/gardening/seedballs.shtml
http://en.wikipedia.org/wiki/Guerrilla_gardening