PT - JOURNAL ARTICLE AU - William R Reichenstein TI - On standard deviation and risk AID - 10.3905/jpm.1987.409093 DP - 1987 Jan 31 TA - The Journal of Portfolio Management PG - 39--40 VI - 13 IP - 2 4099 - https://pm-research.com/content/13/2/39.short 4100 - https://pm-research.com/content/13/2/39.full