@incollection{spigler:1997:slg,
    author = {Spigler, Renato and Vianello, Marco},
    editor = {Elaydi, S. and Gy{\H{o}}ri, I. and Ladas, G.},
     title = {A Survey on the {L}iouville-{G}reen ({W}{K}{B}) Approximation
              for Linear Difference Equations of the Second Order.},
 booktitle = {Advances in Difference Equations (Veszpr\'em, 1995)},
     pages = {567–577},
 publisher = {Gordon and Breach},
   address = {Amsterdam},
      year = {1997},
   mrclass = {39A10},
  mrnumber = {MR1638524 (99e:39041)},
     zblno = {0892.39018}}