RT Journal Article SR Electronic T1 The M-Vector Model JF The Journal of Portfolio Management FD Institutional Investor Journals SP 92 OP 98 DO 10.3905/jpm.23.2.92 VO 23 IS 2 A1 Sanjay K. Nawalkha A1 Donald R. Chambers YR 1997 UL https://pm-research.com/content/23/2/92.abstract AB