@article{10_21136_MB_2009_140672,
     author = {Xu, Xian and Wang, Bingjin},
     title = {Multiplicity results for sign-changing solutions of an operator equation in ordered {Banach} space},
     journal = {Mathematica Bohemica},
     pages = {399--409},
     publisher = {mathdoc},
     volume = {134},
     number = {4},
     year = {2009},
     doi = {10.21136/MB.2009.140672},
     mrnumber = {2597235},
     zbl = {1212.47051},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2009.140672/}
}