1. Brebbia, C. A., Telles, J. F. C., Wrobel, L. C.: Boundary element techniques. Berlin Heidelberg New York Tokyo: Springer 1984.
2. Balas, J., Sladek, J., Sladek, V.: Stress analysis by boundary element methods. Amsterdam: Elsevier 1989.
3. Lutz, E., Gray, L. J., Ingraffea, A. R.: An overview of integration methods for hypersingular boundary integrals. In: Boundary elements XIII (Brebbia, C. A., Gipson, G. S., eds.), pp. 913?925. CMP, Southampton. London: Elsevier 1991.
4. Hayami, K.: A projuection transformation method for nearly singular surface boundary element integrals. Ph.D. Thesis, Wessex Inst. of Technol., Southampton 1991.
5. Sladek, V., Sladek, J., Tanaka, M.: Regularization of hypersingular and nearly-singular integrals in the potential theory and elasticity (submitted for publication).