@article{1077465189, author = {Duffin, R. J.}, title = {Discrete potential theory}, journal = {Duke Math. J.}, volume = {20}, number = {1}, year = {1953}, pages = { 233-251}, language = {en}, url = {http://dml.mathdoc.fr/item/1077465189} }
Duffin, R. J. Discrete potential theory. Duke Math. J., Tome 20 (1953) no. 1, pp. 233-251. http://gdmltest.u-ga.fr/item/1077465189/