Standard DIN 1306, Publication date: 1984-06 Density; concepts, presentation of values

Standard DIN 1343, Publication date: 1990-01 Reference conditions, normal conditions, normal volume; concepts and values

Standard DIN 32629, Publication date: 1988-11 Portion of substance; concept, characterization

Standard DIN 51857, Publication date: 1997-03 Gaseous fuels and other gases - Calculation of calorific value, density, relative density and Wobbe index of pure gases and gas mixtures

Standard DIN 51896-1, Publication date: 1991-10 Gas analysis; quantities of compositions, compressibility factor; basis

Standard DIN 51896-2, Publication date: 1994-09 Gas analysis - Quantities of composition, compressibility factor - Part 2: Application

Standard ISO 6976, Publication date: 1995-12 Natural gas - Calculation of calorific values, density, relative density and Wobbe index from composition