WMAPコールドスポット
↑ Dark Energy and the Imprint of Super-Structures on the Microwave Background
↑ Cruz, M.; N. Turok, P. Vielva, E. Martinez-Gonzalez, M. Hobson (2007). “A Cosmic Microwave Background Feature Consistent with a Cosmic Texture”. Science 318: 1612. doi:10.1126/science.1148694. http://www.sciencemag.org/cgi/content/abstract/1148694 2007年10月25日閲覧。.
↑ The void: Imprint of another universe?, New Scientist, 2007-11-24
↑ Evidence for a parallel universe?, The Blog of Science
↑ Zhang & Huterer (2009), "Disks in the sky: A reassessment of the WMAP "cold spot", http://arxiv.org/abs/0908.3988