@article{spigler:1992:lga,
    author = {Spigler, Renato and Vianello, Marco},
     title = {{L}iouville-{G}reen approximations for a class of linear
              oscillatory difference equations of the second order},
   journal = {J. Comput. Appl. Math.},
  fjournal = {Journal of Computational and Applied Mathematics},
    volume = {41},
      year = {1992},
    number = {1-2},
     pages = {105–116},
      issn = {0377-0427},
     coden = {JCAMDI},
   mrclass = {39A10},
  mrnumber = {MR1181712 (94e:39007)},
mrreviewer = {Wan Biao Ma},
       doi = {10.1016/0377-0427(92)90241-O},
     zblno = {0749.39001}}