@article{Grzywaczewski:2017,
author
=
"G.Grzywaczewski and A.Bochniak and J.Wiącek and P.Łapiński and F.Morelli",
title
=
"Water on the Fen Mire as a Problem in the Protection of Globally Threatened Species: Long-Term Changes in Aquatic Warbler Numbers",
journal
=
"Polish Journal of Environmental Studies",
volume
=
"Vol. 26",
number
=
"no. 2",
pages
=
"613--618",
year
=
"2017",
}