PT - JOURNAL ARTICLE AU - Peter L. Bernstein TI - A bridge to be proud of AID - 10.3905/jpm.1987.409102 DP - 1987 Apr 30 TA - The Journal of Portfolio Management PG - 1--3 VI - 13 IP - 3 4099 - https://pm-research.com/content/13/3/1.short 4100 - https://pm-research.com/content/13/3/1.full