Social Democracy and the National Question by Vladimir Medem in 1904
Social Democracy and the Nationalities Question by Otto Bauer in 1907
The National Question and Autonomy by Rosa Luxemburg in 1909^[1]
Theses on the National Question, writings by Vladimir Lenin in 1913, first published in 1925^[2]
The Problem of Nationalities, Chapter 39 of Leon Trotsky's History of the Russia Revolution Volume 3: The Triumph of the Soviets^[3]
Marxism and the National Question, a 1913 pamphlet by Joseph Stalin on the definition and roles of nations within Marxism
Zur nationalen Frage in Österreich, a 1937 articles by Alfred Klahr on Austria
On the Question of Nationalities in Ethiopia by Wallelign Mekonnen in 1969

In socialism

Other national questions