@article{NSJOM_2004_34_1a_13,
     author = {M. 

 Budin\v{c}evi\'c},
     title = {On the periodic 

 solution of a class of difference equations},
     journal = {Novi Sad Journal of Mathematics},
     pages = {131-133},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {2004},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2004_34_1a_13/}
}