@article{Czechowski:2009,
author
=
"P.Czechowski and P.Zduniak",
title
=
"Untypical eggs of the Barn Swallow (Hirundo rustica)",
journal
=
"Hirundo",
volume
=
"Vol. 21",
number
=
"no. 2",
pages
=
"87--91",
year
=
"2008",
}