For a laymen’s explanation of the theory read my article published in the Bulletin of American Mensa
Forbes Magazine published the work in their online journal. “Physicists Claim Universe ‘Rings’ Like Crystal Glass” – Forbes 2015 06
In 2014 Astronomical Journal Published the first of two papers on “The Ringing Universe”
In 2015 the second paper was published in Astronomical Journal
At the American Astronomical Society’s June 2014 meeting Dr. Ringermacher presented this paper. This presentation can be viewed on YouTube.