@article{Sobota:2009,
author
=
"G.Sobota and B.Gabryś",
title
=
"Parasitoids and hyperparasitoids of aphids caught in yellow traps in selected field crops",
journal
=
"Aphids and other hemopterous insects : University of Warmia and Masuria ; Olsztyn",
volume
=
"Vol. 7",
pages
=
"297--303",
year
=
"1999",
}