In the original publication that’s the subject of the article, it was: https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/tr-2008-11.pdf https:

In the original publication that’s the subject of the article, it was: https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/tr-2008-11.pdf https://www.microsoft.com/en-us/research/wp-content/uploads/...