@article{Jerzak:2012,
author
=
"L.Jerzak and O.Ciebiera and J.Boehner",
title
=
"Seasonal changes in group size and foraging activity in an urban population of Magpies (Pica pica)",
journal
=
"International Studies of Sparrows",
volume
=
"Vol. 36",
pages
=
"80--87",
year
=
"2012",
}