1. Back to the Moon: the scientific rationale for resuming lunar surface exploration;Crawford;Planet. Space Sci.,2012
2. ISECG - January 2018 “Global Exploration Roadmap” viewed on 10th May 2018 (https://www.nasa.gov/sites/default/files/atoms/files/ger_2018_small_mobile.pdf).
3. Interaction Challenges in Human-robot Space Exploration;Fong,2005
4. Diviner lunar radiometer observations of cold traps in the Moon's South Polar region;Paige;Science,2010