@article{Maciejewski:2009,
author
=
"A.Maciejewski and M.Przybylska and H.Yoshida",
title
=
"Necessary conditions for super-integrability of Hamiltonian systems",
journal
=
"Physics Letters, Section A: General, Atomic and Solid State Physics",
volume
=
"Vol. 372",
number
=
"no 34",
pages
=
"5581--5587",
year
=
"2008",
}