1. Profit potential in an "almost efficient" market;K P Ambachtsheer;The Journal of Portfolio Management,1974
2. Where are the customers' alphas?;K P Ambachtsheer;The Journal of Portfolio Management,1977
3. Can active management add value;K P Ambachtsheer;Financial Analysts Journal,1979
4. Problems in measuring the quality of investment information: The perils of the information coefficient;T D Coggin;Financial Analysts Journal,1983