2020DIN EN 16603-11:2020-02 Space engineering - Definition of the Technology Readiness Levels (TRLs) and their criteria of assessment (ISO 16290:2013, modified); German version EN 16603-11:2019
1970DIN EN 16603-11 E:2018-07 Space engineering - Definition of the Technology Readiness Levels (TRLs) and their criteria of assessment