@article{Duval:2014,
author
=
"G.Duval and A.Maciejewski",
title
=
"Integrability of Hamiltonian systems with homogeneous potentials od degrees [...]2. An application of order variational equations",
journal
=
"Discrete and Continuous Dynamical Systems",
volume
=
"Vol. 34",
number
=
"no. 11",
pages
=
"4589--4615",
year
=
"2014",
}