1. W. T. Koiter , “On the Stability of Elastic Equilibrium” ( in Dutch ), Thesis , Delft , H. J. Paris , Amsterdam , 1945 ; English translation published as NASA TT F–10, 833 (1967) and AFFDL Report TR 70–25 (1970) .
2. W. T. Koiter , Post–buckling analysis of a simple two–bar frame, in Recent Progress in Applied Mechanics ( The Folke–Odqvist Volume ), Almqvist and Wiksell , Stockholm , 1967.
3. Frame buckling: An illustration of the perturbation technique