@article{MM_2009_21_3_a9,
     author = {A. V. Lasunsky},
     title = {Equilibriums and cycles of some nonautonomous difference equations},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {120--126},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_2009_21_3_a9/}
}