1. Hellinger E. Der allgemein Ansatz der Machanik der Kontinua. Encyclopqdia der Mathematischen Wissenschaften, 1914, 4: 602
2. Reissner E. On a variational theorem for finite elastic deformation. J Math Phys, 1953, 32: 129–135
3. Levinson M. The complementary energy theorem in finite elasticity. J Appl Mech, 1965, 32: 826–828
4. Washizu K. Variational Methods in Elasticity and Plasticity. Oxford: Pergamon press, 1968
5. Zubov L M. The stationary principle of complementary work in nonlinear theory of elasticity. Prikl Mat Mech, 1970, 34: 228–232