Kernel functions and elliptic differential equations in mathematical physics / by Stefan Bergman and M. Schiffer. Bergman, Stefan, 1898-1977. Schiffer, Menahem, joint author. Functions. Differential equations. QA3 .P8 vol. 4 517.38 BEK Includes Index. Bibliography: p. [408]-419. New York : Academic Press, c1953. c1953. 1953 Text xiii, 432 p. eng Pure and applied mathematics (Academic Press) 4