1. Variational Methods in Elasticity and Plasticity;Washizu,1975
2. Some Basic Problems of the Mathematical Theory of Elasticity;Muskhelishvili,1953
3. Integral Equations;Mikhlin,1957
4. Potential Methods in the Theory of Elasticity;Kupradze,1965
5. Integral equations and partial differential equations;Smirnov,1964