@article{Leoński:2009,
author
=
"W.Leoński and R.Tanaś",
title
=
"Finite energy states for periodically kicked nonlinear oscillator",
journal
=
"Acta Physica Slovaca",
volume
=
"Vol. 49",
number
=
"no 4",
pages
=
"713--718",
year
=
"1999",
}