1. S. H. Baron, Plekhanov: The Father of Russian Marxism (Stanford: Stanford University Press, 1963) pp. 122, 142, 161.
2. S. H. Baron, ‘Legal Marxism and the “Fate of Capitalism” in Russia’, American Slavic and East European Review, 16, 1957, pp. 113–26.
3. R. Larsson, Theories of Revolution (Stockholm: Almqvist & Wiksell, 1970) pp. 307–8.
4. S. Avineri, The Social and Political Thought of Karl Marx (Cambridge: Cambridge University Press, 1968).
5. L. Kolakowski, Main Currents of Marxism, I. The Founders (Oxford: Oxford University Press, 1978).