Where can I find the paper "Life cycle sustainability assessment (LCSA) for products and processes."

I am currently studying circular economy theory. More specifically life cycle sustainability assessment theory. And I notice that a paper in this area that presents a lot of citations is

Finkbeiner, M., K. Reimann, and R. Ackermann. 2008. Life cycle
sustainability assessment (LCSA) for products and processes. Paper
presented at SETAC Europe 18th Annual Meeting, 25–29 May 2008, Warsaw,
Poland.

I trying to find this paper through the internet (in order to buy or download it, I don’t know the current availability policy for this paper). But I was not even able to find the DOI code of this paper.

Can anyone help me to find how I can read such paper?