%0 Journal Article %E Peter L. Bernstein %T Of Keynes, Copernicus, Markowitz, and Harvard %D 1990 %R 10.3905/jpm.1990.1 %J The Journal of Portfolio Management %P 1-1 %V 16 %N 3 %U https://jpm.pm-research.com/content/iijpormgmt/16/3/1.full.pdf