1. Angle, J. The surplus theory of social stratification and the size distribution of personal wealth. 1983 Proceedings of the Social Statistics Section of the American Statistical Association. pp.395–400.
2. The Surplus Theory of Social Stratification and the Size Distribution of Personal Wealth
3. Angle, J. A stochastic interacting particle system model of the size distribution of wealth and income. 1990 Proceedings of the Social Statistics Section of the American Statistical Association. pp.279–284.