I've been unable to locate the paper, i'd imagine since it's been published in that professional journal, it'll be a few more years before it's released publicly, and i can't track down a pre-published version... let me know if you do.
This page (from the authors site) gives a great run down, along with animations, including the observations measured around Sag A.
http://www.extinctionshift.com/topic_07.htm