Pulkkinen, A J, Martikainen, A A & Kuusela, J H 2012, A Framework of design for procurement . in 2012 18th International ICE Conference on Engineering, Technology and Innovation . IEEE Institute of Electrical and Electronic Engineers, pp. 307-316 . https://doi.org/10.1109/ICE.2012.6297662
56th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law.