1. Exposition of a New Theory on the Measurement of Risk
2. Portfolio theory: A theory of risky decision making;Coombs,1969
3. Additivity of risk in portfolios;Coombs;Perception and Psychophysics,1971
4. A test of VE-theories of risk and the effect of the central limit theorem;Coombs;Acta Psychologica,1971
5. Polynomial psychophysics of risk;Coombs;Journal of Mathematical Psychology,1970