Where can I find the published work by Paul Crutzen regarding possibility of releasing sulphurous debris?

I've been surfing the web to find the research paper of PaulCrutzen in 2006 about creating haze of sulfur to keep earth cool, but can't find it. I can only find short articles or his othe works , especially the one which won him a Nobel Prize. Still couldn't find the 2006 published work bout that sulfur thing, can anyone help me plz?quite urgent here...thank u....:)