1. Bergson, A . 1965: Essays in normative economics. Harvard University Press (Belknap Press): Cambridge, MA.
2. Bergson, A . 1983: Technological progress In: Bergson, A and Levine, H. (eds). The Soviet economy: Toward the year 2000. George Allen & Unwin: London. pp. 34–78.
3. Bigg, C . 2005: Russia: Migrant workers struggle to build lives amid poverty, abuse. Radio Liberty, 8 November.
4. Birman, I . 1983: Ekonomika Nedostach. Chaldize Publications: Benson Vermont.
5. Birman, I . 1986: The soviet economy: Alternative views. Russia 12: 69–71.