Natural gas - Calculation of thermodynamic properties - Part 2: Single-phase properties (gas, liquid, and dense fluid) for extended ranges of application (ISO 20765-2:2015)— 72 стр.
Standardization - Part 2: Presentation of documents (ISO/IEC Directives - Part 2:2016, modified); German and English version CEN/CENELEC Internal Regulations - Part 3:2017— 231 стр.