@article{10_4064_am32_3_4,
     author = {Jifeng Chu and Daqing Jiang and Donal O'Regan and R. P. Agarwal},
     title = {Multiplicity of positive solutions
 to second order differential equations
 with {Neumann} boundary conditions},
     journal = {Applicationes Mathematicae},
     pages = {293--303},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {2005},
     doi = {10.4064/am32-3-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am32-3-4/}
}