@article{1077474864,
author = {Bergman, S. and Schiffer, M.},
title = {Kernel functions in the theory of partial differential
equations of elliptic type},
journal = {Duke Math. J.},
volume = {15},
number = {1},
year = {1948},
pages = { 535-566},
language = {en},
url = {http://dml.mathdoc.fr/item/1077474864}
}
Bergman, S.; Schiffer, M. Kernel functions in the theory of partial differential
equations of elliptic type. Duke Math. J., Tome 15 (1948) no. 1, pp. 535-566. http://gdmltest.u-ga.fr/item/1077474864/