1. W.J. Kennedy, Analytical techniques for assessing gateway and other spacecraft antenna line-of-sight, IAC-19-B2.7.4.x50328, 70th International Astronautical Congress, Washington, DC, United States, 2019, 21 –25 October.
2. NASA awards artemis contract for lunar Gateway power, propulsion. 23 May 2019, https://www.nasa.gov/press-release/nasa-awards-artemis-contract-for-lunar-gateway-power-propulsion, (accessed 25.09.2021).
3. Maxar completes power and propulsion element preliminary design review. 12 July 2021, https://www.maxar.com/press-releases/maxar-completes-power-and-propulsion-element-preliminary-design-review, (accessed 25.09.2021).
4. NASA, Northrop Grumman finalize moon outpost living quarters contract. 9 July 2021, https://www.nasa.gov/press-release/nasa-northrop-grumman-finalize-moon-outpost-living-quarters-contract, (accessed 25.09.2021).
5. Northrop Grumman completes preliminary design review for NASA's Gateway crew module. 18 November 2020, https://news.northropgrumman.com/news/releases/northrop-grumman-completes-preliminary-design-review-for-nasas-gateway-crew-module, (accessed 25.09.2021).