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Alex Ellery,  Low-Cost Space-Based Geoengineering: An Assessment Based on Self-Replicating Manufacturing of in-Situ Resources on the Moon.   journal   = {International Journal of Environmental, Chemical, Ecological, Geological and Geophysical Engineering}, [online]. World Academy of Science, Engineering and Technology. February 2016, vol. 110(2). 278 - 285[viewed 20 July 2018]. Available from: http://waset.org/publications/10006851.