1. Variational methods for the solution of problems of equilibrium and vibrations;Courant;Bulletin of American Mathematical Society, 49,1943
2. Stiffness and deflection analysis of complex structures;Turner;Journal of Aeronautical Sciences, 23,1956
3. Energy theorems and structural analysis;Argyris;Aircraft Engineering,1954
4. The finite element method in plane stress analysis;Clough,1960
5. Theory of Matrix Structural Analysis;Przemieniecki,1968