@article{Drzewiński:2009,
author
=
"A.Drzewiński and J.Sznajd",
title
=
"On the real-space renormalization-group study of some 2D quantum spin systems",
journal
=
"Physica A: Statistical Mechanics and its Applications",
volume
=
"Vol. 170",
pages
=
"415--438",
year
=
"1991",
}