1. Bergson, A . 1944: The Structure of Soviet Wages: A Study in Socialist Economics, Harvard Economic Studies, Vol. 76. Harvard University Press: Cambridge.
2. Bergson, A . 1961: The Real National Income of Soviet Russia Since 1928. Harvard University Press: Cambridge.
3. Gregory, P . 2003: An Introduction to the Economics of the Gulag. In: Gregory, P. and Valery, L. (eds). The Economics of Forced Labor: The Soviet Gulag. Hoover Institution Press: Stanford.
4. Gregory, P . 2004: The Political Economy of Stalinism. Cambridge University Press: London.
5. Khlevnyuk, O . 2003: The Economy of the OGPU, NKVD, and MVD of the USSR, 1930–1953: the Scale, Structure, and Trends of Development. In: Gregory, P. and Valery, L. (eds). The Economics of Forced Labor: The Soviet Gulag. Hoover Institution Press: Stanford.