1. Brush D. O. Almroth B. O. (1975). Buckling of bars plates and shells . McGraw‐Hill New York N.Y.
2. Structural Response Variability II
3. Gourlay A. R. and Watson G. A. (1973). Computational methods for matrix eigenproblems . Wiley and Sons New York N.Y.
4. Huseyin K. (1975). Nonlinear Theory of Elastic Stability . Noordhoff Leyden The Netherlands.