PT - JOURNAL ARTICLE AU - Jacques Ittensohn TI - Back to the drawing board! AID - 10.3905/jpm.1982.408890 DP - 1982 Oct 31 TA - The Journal of Portfolio Management PG - 28--32 VI - 9 IP - 1 4099 - https://pm-research.com/content/9/1/28.short 4100 - https://pm-research.com/content/9/1/28.full