1. Britvec, S. J.: The stability of elastic systems. Oxford: Pergamon Unified Engineering Series 1973.
2. Simitses, G. J., Kounadis, A. N.: Buckling of imperfect rigid jointed frames. J. of Eng. Mech. Division, ASCE,104, EM3, 569, 586 (1978).
3. Pflüger, A.: Stabilitätsprobleme der Elastostatik. Berlin: Springer 1950.
4. Kounadis, A. N.: A comparative study of frames by the exact elastica, theory and other approximate analyses. (To be published.)
5. Kounadis, A. N.: Introduction to the nonlinear theory of elastic stability. Edition of National Technical University of Athens, 1984.