@article{10_21136_MB_1997_125912,
     author = {Vr\'abe\v{l}, R\'obert},
     title = {Upper and lower solutions for singularly perturbed semilinear {Neumann's} problem},
     journal = {Mathematica Bohemica},
     pages = {175--180},
     publisher = {mathdoc},
     volume = {122},
     number = {2},
     year = {1997},
     doi = {10.21136/MB.1997.125912},
     mrnumber = {1460947},
     zbl = {0893.34052},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.21136/MB.1997.125912/}
}