@article{Tomaszewski:2013,
author
=
"M.Tomaszewski",
title
=
"Chosen factors influencing cooperation in Western Poland in the 2009-2011 period",
journal
=
"Acta Scientiarum Polonorum. Oeconomia",
number
=
"no. 12 (4)",
pages
=
"123--131",
year
=
"2013",
}