Analysis of information sources in references of the Wikipedia article "Marksizm" in Azerbaijani language version.
The German Marxists extended the theory to groups and issues Marx had barely touched. Marxian analyses of the legal system, of the social role of women, of foreign trade, of international rivalries among capitalist nations, and the role of parliamentary democracy in the transition to socialism drew animated debates ... Marxian theory (singular) gave way to Marxian theories (plural).
