Signed, Sealed, Delivered, They're Ours: Illinois Sources Cloud Computing Receipts Using Market-Based Approach : SALT Shaker : State & Local Tax Attorneys : Sutherland Asbill & Brennan Law Firm

http://www.stateandlocaltax.com/noteworthy-cases/signed-sealed-delivered-theyre-ours-illinois-sources-cloud-computing-receipts-using-market-based-app/