Duration Analysis: Managing Interest Rate Risk. Michael R. Granito; Gerald O. Bierwag Journal of Finance 1988 43(1), 264
Durations for portfolios of bonds priced on different term structures Gerald O. Bierwag; Charles J. Corrado; George G. Kaufman Journal of Banking & Finance 1992 16(4), 705-714
Designing an immunized portfolio: Is M-squared the key? Gerald O. Bierwag; Iraj Fooladi; Gordon S. Roberts Journal of Banking & Finance 1993 17(6), 1147-1170