1. [1] http://www.jaxa.jp/projects/rockets/epsilon/
2. [2] http://www.jaxa.jp/projects/sat/sprint_a/
3. [3] http://www.jaxa.jp/projects/iss_human/kibo/
4. [4] http://www.jaxa.jp/press/2014/03/20140309_wakata_j.html
5. [5] http://www.jpl.nasa.gov/msl/