RT Journal Article SR Electronic T1 How do Call Provisions Influence Bond Yields? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 55 OP 57 DO 10.3905/jpm.1979.55 VO 5 IS 2 A1 Michael G. Ferri YR 1979 UL https://pm-research.com/content/5/2/55.abstract AB