C. E. Siewert and J. R. Thomas, Jr. Z. angew. Math. Phys.32, 421 (1981).
M. D. Arthur and C. Cercignani, Z. angew. Math. Phys.31, 634 (1980).
C. E. Siewert and P. Benoist, Nucl. Sci. Eng.,69, 156 (1979).
P. Grandjean and C. E. Siewert, Nucl. Sci. Eng.,69, 161 (1979).
C. E. Siewert, R. D. M. Garcia and P. Grandjean, J. Math. Phys.,21, 2760 (1980).
N. I. Muskhelishvili,Singular integral equations (Noordhoff, Groningen-Holland, 1953).