Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1923__89_159000, author = {R. Courant}, title = {Zur {Theorie} der linearen {Integralgleichungen}}, journal = {Mathematische Annalen}, pages = {161--178}, publisher = {mathdoc}, volume = {89}, year = {1923}, zbl = {49.0274.01}, url = {http://geodesic.mathdoc.fr/item/MAN_1923__89_159000/} }
R. Courant. Zur Theorie der linearen Integralgleichungen. Mathematische Annalen, Tome 89 (1923), pp. 161-178. http://geodesic.mathdoc.fr/item/MAN_1923__89_159000/