@article{Karczewska:2015,
author
=
"A.Karczewska and P.Rozmej and E.Infeld",
title
=
"Energy invariant for shallow-water waves and the Korteweg-de Vries equation: Doubts about the invariance of energy",
journal
=
"Physical Review E",
volume
=
"Vol. 92",
pages
=
"1--15",
year
=
"2015",
}