1. Wild military operations in outer space: a sword of Damocles hanging over the future of space environment and space activities;Frigoli,2017
2. Nearly $1 Billion Was Invested in Space Startups in 1Q2018, New Report Says, Forbes;Knapp,2018
3. Private commercial space enterprises and global governance system;Jakhu,2017
4. Disruptive technologies: catching the wave (technological investments);Bower;Harv. Bus. Rev.,1995
5. Earth Observation: A Downstream Market Perspective;Nikam,2019