That temperature, characteristic of each gas, above which it is not possible to liquefy
a given gas.
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2183
PAC, 1993, 65, 2397
(Nomenclature for supercritical fluid chromatography and extraction (IUPAC Recommendations
on page 2399