Analysis of information sources in references of the Wikipedia article "Socialismo di mercato" in Italian language version.
«[...] [B]y the 1820s, 'Smithian' apologists for industrial capitalism confronted 'Smithian' socialists in a vigorous, and often venomous, debate over political economy.»
«It was in the early 1920s that the expression 'market socialism' (marktsozialismus) became commonplace. A special term was considered necessary to distinguish those socialists prepared to accept some role for factor markets from the now mainstream socialists who were not.»
«Finally, there is the curious circumstance that Lange’s system is widely hailed as a pioneering effort in the theory of market socialism, when it is demonstrably no such thing: even the name ‘market socialism’ predates Lange, and Lange’s system is explicitly a proposal to replace the market with a non-market system.»