Brebbia, C. A. / 1984 / Boundary Element Techniques – Theory and Applications in Engineering / Springer Chen, J. T. / 1995 / Dual boundary integral equations for exterior problems / Eng. Anal. Bound. Elem 16:333~340 Chen, J.T. / 1999 / Review of dual boundary element methods with emphasis on hypersingular integrals and divergent series / Appl. Mech. Rev 52:17~33 Chen, J.T. / 2000 / Dual boundary element analysis using complex variable for potential problems with or without a degenerate boundary / Eng. Anal. Bound. Elem 24:671~684 Chen, J.T. / 2002 / On the Pseudo-differential operators in the dual boundary integral equations using degenerate kernels and circulants / Eng. Anal. Bound. Elem 26:41~53