@article{1183528184, author = {Keller, Herbert B.}, title = {Existence theory for two point boundary value problems}, journal = {Bull. Amer. Math. Soc.}, volume = {72}, number = {4}, year = {1966}, pages = { 728-731}, language = {en}, url = {http://dml.mathdoc.fr/item/1183528184} }
Keller, Herbert B. Existence theory for two point boundary value problems. Bull. Amer. Math. Soc., Tome 72 (1966) no. 4, pp. 728-731. http://gdmltest.u-ga.fr/item/1183528184/