1. Inoue H, Otake H, Ohtake M, Yamamoto M, Hoshino T, Shimad T, Masuda K, Morimoto H, Wakabayashi S, Hashimoto T (2018) Landing site analysis for future lunar polar exploration missions. In: 49th Lunar and planetary science conference 2018 (LPI Contrib. No. 2083). https://www.hou.usra.edu/meetings/lpsc2018/pdf/1738.pdf
2. Li C, Liu D, Liu B, Ren X, Liu J, He Z, Zuo W, Zeng X, Xu R, Xu T, Zhang X, Chen W, Shu R, Wen W, Su Y, Zhang H, Ouyang Z (2019) Chang’E-4 initial spectroscopic identification of lunar far-side mantle-derived materials. Nature 569:378–382. https://doi.org/10.1038/s41586-019-1189-0
3. Bagla P (2018) India plans to land near moon’s south pole. Science 359(6375):503–504. https://doi.org/10.1126/science.359.6375.503
4. Siddiqi AA (2018) Beyond earth: a chronicle of deep space exploration, 1958–2016. National Aeronautics and Space Administration, Washington
5. Jia Y, Zou Y, Ping J, Xue C, Yan J, Ning Y (2018) The scientific objectives and payloads of Chang’E-4 mission. Planet Space Sci 162:207–215. https://doi.org/10.1016/j.pss.2018.02.011