1. Forrington, J.H. (Cass) (2022) Journal of Cosmology, 27, 15110-15145. https://thejournalofcosmology.com/General%20Relativity%20and%20Effects%20in%20Time%20as%20Causation%20JoC.pdf
2. LIGO Caltech (2016) Press Conference, Washington, DC. https://www.ligo.caltech.edu/detection
3. NASA (2013) IBEX Reveals a Missing Boundary at the Edge of the Solar System. https://www.nasa.gov/mission_pages/ibex/news/nobowshock.html
4. John Hopkins University Gazette (2013) APL Gets More Solar Surprises from NASA’s Voyager. https://hub.jhu.edu/gazette/2013/august/apl-voyager-space/