Harichandran, R. S. (1991). "Stiffness reduction factor for LRFD of columns." Technical Note, Engineering Journal, AISC, 28(3), 129-130.

Abstract

The stiffness reduction factors given in Table A (page 2-8) of the first edition of the LRFD Manual has an error that needs to be corrected. The error occurs in adopting the technique originally proposed by Yura in the context of ASD to LRFD.