@article{04198788, title = {Nonnegative solutions of two-point boundary value problems for nonlinear second order integrodifferential equations in Banach spaces.}, journal = {Journal of Applied Mathematics and Stochastic Analysis}, volume = {4}, year = {1991}, pages = {47-69}, doi = {10.1155/S1048953391000035}, zbl = {0726.45014}, language = {en}, url = {http://dml.mathdoc.fr/item/04198788} }
Guo, Dajun. Nonnegative solutions of two-point boundary value problems for nonlinear second order integrodifferential equations in Banach spaces.. Journal of Applied Mathematics and Stochastic Analysis, Tome 4 (1991) pp. 47-69. doi : 10.1155/S1048953391000035. http://gdmltest.u-ga.fr/item/04198788/