1. TIME magazine, 2019. https://time.com/longform/ race-to-the-moon/.
2. TIME magazine, 1968. http://content.time.com/time/ covers/0,16641,19681206,00.html.
3. NASA’s Artemis Moon Program. https://www.nasa. gov/artemis-moon-program-advances.
4. Roscosmos space program. https://www.roscosmos.ru/ 22347/.
5. Ivanyukhin, A.V. and Petukhov, V.G., Low-energy sub-optimal low-thrust trajectories to libration points and halo-orbits, Cosm. Res., 2019, vol. 57, no. 5, pp. 378–388.