Grodzińska-Jurczak M., Strzelecka M., Kamal S., Gutowska J. () Effectiveness of Nature Conservation a case of Natura 2000 sites in Poland. W: Protected Area ManagementInTech, Rijeka http://www.intechopen.com/books/protected-area-management/effectiveness-of-nature-conservation-a-case-of-natura-2000-sites-in-poland