@article{Matlak:2009,
author
=
"M.Matlak and B.Grabiec and S.Krawiec",
title
=
"Electronic correlations within fermionic lattice models",
journal
=
"Acta Physica Polonica A",
volume
=
"Vol. 112",
number
=
"no 3",
pages
=
"537--547",
year
=
"2007",
}