@article{10_4064_am31_1_2,
     author = {Wen-Xian Lin},
     title = {On the existence of positive solutions
  of second order neutral difference equations},
     journal = {Applicationes Mathematicae},
     pages = {5--11},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {2004},
     doi = {10.4064/am31-1-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am31-1-2/}
}