The decarboxylation of carboxylate salts (such as sodium carboxylate) to yield alkanes and carbonate salts is a classic, textbook chemical reaction (exemplified by processes like the Kolbe electrolysis and traditional thermal decarboxylation) that does not require citation.
The claim describes a fundamental, well-established chemical transformation taught in introductory organic chemistry, making it common knowledge. No specific retrieved paper directly focuses on this precise generalized reaction as its primary thesis, but standard chemical principles validate it.