RT Journal Article SR Electronic T1 How to Structure Efficient International Portfolios JF The Journal of Portfolio Management FD Institutional Investor Journals SP 62 OP 66 DO 10.3905/jpm.1976.408583 VO 3 IS 1 A1 Jacques Ittensohn YR 1976 UL https://pm-research.com/content/3/1/62.abstract AB