@article{Maciejewski:2009,
author
=
"A.Maciejewski and M.Przybylska and J.Weil",
title
=
"Non-integrability of the generalized spring-pendulum problem",
journal
=
"Journal of Physics A : Mathematical and General",
volume
=
"Vol. 37",
number
=
"no 7",
pages
=
"2579--2597",
year
=
"2004",
}