DIN EN 14737-2:2005 Space engineering - Ground systems and operations - Part 2: Documents requirements definitions (DRDs); English version EN 14737-2:2004
2015DIN EN 16603-70:2015 Space engineering - Ground systems and operations; English version EN 16603-70:2015
2005DIN EN 14737-2:2005 Space engineering - Ground systems and operations - Part 2: Documents requirements definitions (DRDs); English version EN 14737-2:2004