RT Journal Article SR Electronic T1 Return enchancement from “foreign” assets JF The Journal of Portfolio Management FD Institutional Investor Journals SP 5 OP 13 DO 10.3905/jpm.1991.409349 VO 17 IS 4 A1 Martin L. Leibowitz A1 Stanley Kogelman YR 1991 UL https://pm-research.com/content/17/4/5.abstract AB