Economic Manuscripts: Theories of Surplus-Value, Addenda to Part 2 https://marxistleninists.org/M&E/1863/theories-surplus-value/add2.htm
Economic Manuscripts: Theories of Surplus-Value, Chapter 13 https://marxistleninists.org/M&E/1863/theories-surplus-value/ch13.htm
Prof. Gabriel Rockhill on Zizek-Foucault, postmodernism, socialism, & identity politics https://www.youtube.com/watch?v=kcTqDz2DQlI
Lenin Archive English http://ciml.250x.com/archive/lenin/english/lenin_1908_preface_12_years_collection.html
Lenin: 30. TO THE EDITORIAL BOARD OF PRAVDA https://www.marxists.org/archive/lenin/works/1913/feb/14p.htm