RT Journal Article SR Electronic T1 Semivariance in Risk-Based Index Construction JF The Journal of Investing FD Institutional Investor Journals SP 82 OP 87 DO 10.3905/joi.1997.408419 VO 6 IS 2 A1 Paul D. Kaplan A1 Rodney H. Alldredge YR 1997 UL https://pm-research.com/content/6/2/82.abstract AB