@book{Jerzak:2015,
author
=
"L.Jerzak",
title
=
"International Studies of Sparrows, ISSN: 1734-624X",
publisher
=
"University of Zielona Góra Press",
address
=
"Zielona Góra",
year
=
"2015",
volume
=
"Vol. 39",
}