PT - JOURNAL ARTICLE AU - Martin L. Leibowitz AU - Stanley Kogelman TI - Return enchancement from “foreign” assets AID - 10.3905/jpm.1991.409349 DP - 1991 Jul 31 TA - The Journal of Portfolio Management PG - 5--13 VI - 17 IP - 4 4099 - https://pm-research.com/content/17/4/5.short 4100 - https://pm-research.com/content/17/4/5.full