@article{Dekeyser:2009,
author
=
"R.Dekeyser and A.Drzewiński and J.Van Leeuwen",
title
=
"A new renormalization approach to the ground state of the anisotropic XY model",
journal
=
"Acta Physica Slovaca",
volume
=
"Vol. 44",
number
=
"no 4/5",
pages
=
"357--364",
year
=
"1994",
}