RT Journal Article SR Electronic T1 The Term Structure of Volatility and Bond Option Valuation JF The Journal of Fixed Income FD Institutional Investor Journals SP 19 OP 35 DO 10.3905/jfi.1991.408019 VO 1 IS 2 A1 Mark Koenigsberg A1 Janet Showers A1 James Streit YR 1991 UL https://pm-research.com/content/1/2/19.abstract AB