@article{EJDE_2003__2003__a14,
     author = {Il'yasov, Yavdat and Runst, Thomas},
     title = {Positive solutions for indefinite inhomogeneous {Neumann} elliptic problems},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2003},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a14/}
}