@article{10_4064_ap_73_3_197_220,
     author = {Sui Cheng and Guang Zhang},
     title = {Existence criteria for positive solutions of a nonlinear difference inequality},
     journal = {Annales Polonici Mathematici},
     pages = {197--220},
     publisher = {mathdoc},
     volume = {73},
     number = {3},
     year = {2000},
     doi = {10.4064/ap-73-3-197-220},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-73-3-197-220/}
}