I. Horvath, J. Hakkila e Z. Bagoly, The largest structure of the Universe, defined by Gamma-Ray Bursts, in 7th Huntsville Gamma-Ray Burst Symposium, GRB 2013: paper 33 in eConf Proceedings C1304143, vol. 1311, 2013, p. 1104, Bibcode:2013arXiv1311.1104H, arXiv:1311.1104.
L. G. Balazs, Z. Bagoly e J. E. Hakkila, A giant ring-like structure at 0.78, in Monthly Notices of the Royal Astronomical Society, vol. 452, n. 3, 21 settembre 2015, pp. 2236-2246, DOI:10.1093/mnras/stv1421. URL consultato il 31 maggio 2016.
L. G. Balazs, Z. Bagoly e J. E. Hakkila, A giant ring-like structure at 0.78, in Monthly Notices of the Royal Astronomical Society, vol. 452, n. 3, 21 settembre 2015, pp. 2236-2246, DOI:10.1093/mnras/stv1421. URL consultato il 31 maggio 2016.
I. Horvath, J. Hakkila e Z. Bagoly, The largest structure of the Universe, defined by Gamma-Ray Bursts, in 7th Huntsville Gamma-Ray Burst Symposium, GRB 2013: paper 33 in eConf Proceedings C1304143, vol. 1311, 2013, p. 1104, Bibcode:2013arXiv1311.1104H, arXiv:1311.1104.
R.G.Clowes; "Large Quasar Groups - A Short Review"; 'The New Era of Wide Field Astronomy', ASP Conference Series, Vol. 232.; 2001; Astronomical Society of the Pacific; ISBN 1-58381-065-X ; Bibcode: 2001ASPC..232..108C
Irene Klotz, Universe's Largest Structure is a Cosmic Conundrum, su news.discovery.com, discovery, 19 novembre 2013. URL consultato il 22 novembre 2013 (archiviato dall'url originale il 25 marzo 2015).