I just dig through google scholar till I find something good. The first paper cites "Conditioning and Intervening" by Meek and Glymour, which I looked at recently, so maybe that's how. I can also get to it by searching for "decision theory" within papers citing Pearl's "Causality" (though it's a few pages in). Also, I think Ledwig mentioned Spohn's older stuff in her dissertation on Newcomb's problem. Kind of hard to reconstruct search paths.