Apple, Microsoft, Google, Facebook, Dell and Oracle all have their EU headquarters in Ireland, in addition to a number of very large pharmaceuticals companies. That's entirely due to an extremely generous corporation tax regime, which the EU has recently taken steps to curtail.

https://en.wikipedia.org/wiki/Double_Irish_arrangement

Ireland's GDP was so severely distorted by tax avoidance that the Central Bank had to devise an alternative measure.

https://en.wikipedia.org/wiki/Modified_gross_national_income

There's loads yeah, and they're public, and in mainstream publications. The one I linked is very good, so I don't know why you're asking me for something I already provided - is there something wrong with the article above?

The article itself links to loads of serious primary sources on the matter, including the relevant US government reports and European Commission publications. Have you exhausted those resources?

Or maybe you mean a more mainstream publication, economically speaking. Here's a FT article from 2016 (the first one I see after a search that looks relevant, very easy to find) entitled "Apple tax deal: how it worked and what the EU ruling means":

https://archive.fo/gGC2C#selection-2204.0-2204.1

Here's a tidbit from it:

> 0.05%: Tax rate in effect paid by Apple in Ireland on €16bn profit in 2011

People can think that's economically and/or morally justified if they wish, but the U.S. government thought it was anticompetitive and the E.U. courts have ruled it was illegal.