@article{Kluźniak:2009,
author
=
"W.Kluźniak",
title
=
"High frequency QPOs, nonlinear oscillations in strong gravity",
journal
=
"Astronomische Nachrichten",
volume
=
"Vol. 326",
number
=
"no 9",
pages
=
"820--823",
year
=
"2005",
}