Quite a few of us were trying to unravel a few mysterious (to us, at least) citations in the DOJ letter “RE: Physician Hospitals of America v. Sebelius, No. 11-40631.”
We know now that they are Solicitor General briefs from the DOJ (and, proper attribution of these cites as briefs would have removed all confusion).
While the DOJ researchers cite to Westlaw references that we do not have access to in academia, it would have been far easier to follow their research trail if they had only cited to the free versions of the briefs posted on the DOJ website.
The DOJ Solicitor General site has online briefs going back to 1982. This site is easy to use. You can browse by year, subject matter and client. And, it is all freely available — many as PDFs.