Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MAT_1958_2_6_a2, author = {J. Serrin}, title = {On the {Harnack} inequality for linear elliptic equations}, journal = {Matematika}, pages = {49--62}, publisher = {mathdoc}, volume = {2}, number = {6}, year = {1958}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1958_2_6_a2/} }
J. Serrin. On the Harnack inequality for linear elliptic equations. Matematika, Tome 2 (1958) no. 6, pp. 49-62. http://geodesic.mathdoc.fr/item/MAT_1958_2_6_a2/