| − | Argon works as an asphyxiant and has been shown to be effective in bug eradication in controlled environments, but which is not safe for use as a household room pesticide.http://www.ehow.com/how_7925929_use-gas-kill-bed-bugs.html | + | Argon works as an asphyxiant and has been shown to be effective in bug eradication in controlled environments, but which is not safe for use as a household room pesticide.<ref>http://www.ehow.com/how_7925929_use-gas-kill-bed-bugs.html</ref> |