@article{10_1155_S1048953394000389,
     author = {O'Regan, Donal},
     title = {Existence principles for second order nonresonant boundary value problems.},
     journal = {International Journal of Stochastic Analysis},
     pages = {487},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {1994},
     doi = {10.1155/S1048953394000389},
     zbl = {0819.34019},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.1155/S1048953394000389/}
}