@article{Karczewska:2017,
author
=
"A.Karczewska and P.Rozmej and E.Infeld and G.Rowlands",
title
=
"Adiabatic invariants of the extended KdV equation",
journal
=
"Physics Letters, Section A: General, Atomic and Solid State Physics",
volume
=
"Vol. 381",
number
=
"iss. 4",
pages
=
"270--275",
year
=
"2017",
}