RT Journal Article SR Electronic T1 A new approach to determining optimum portfolio mix JF The Journal of Portfolio Management FD Institutional Investor Journals SP 79 OP 81 DO 10.3905/jpm.1991.409374 VO 17 IS 4 A1 Gordon C. McMeekin YR 1991 UL https://pm-research.com/content/17/4/79.abstract AB