Apr 23, 2002 Caspian Environment Struggles As Nations Jockey Over Energy Riches. ABC news.
Scott Dogget. Dec 28, 2004 In a chokehold: California’s native landscape is losing ground as aggressive imports run wild. Los Angeles Times.
Aug 26, 2005 Non-native Seaweed Threatens Hawaiian Species. National Academy of Sciences.
Carrie Madren. July 15, 2011. A Wild, Weedy Scourge: Fast Spreading Cogongrass Threatens Forests in the U.S. South. The federal government is spending millions to combat a nasty plant that is spreading like wildfire. Scientific American.
Aquatic and Invasive plants website, University of Florida