RT Journal Article SR Electronic T1 Duration JF The Journal of Portfolio Management FD Institutional Investor Journals SP 48 OP 52 DO 10.3905/jpm.1987.409098 VO 13 IS 2 A1 Gerald O. Bierwag A1 George G. Kaufman A1 Cynthia M. Latta A1 Gordon S. Roberts YR 1987 UL https://pm-research.com/content/13/2/48.abstract AB