Bergman, Stefan, 1898- Kernel functions and elliptic differential equations in mathematical physics / by Stefan Bergman and M. Schiffer. - New York Academic Press, 1953. - xiii, 432 p. ; 23 cm. - Pure and applied mathematics no.34 . - Pure and applied mathematics no.34. . Bibliography: p. 408-419. LCCN: 52-013362 Subjects--Topical Terms: Functions.Differential equations.