Polish Journal of Environmental Studies
Polish Journal of Environmental Studies > 2007 > 16 > 3 > 397-402
Polish Journal of Environmental Studies > 2007 > 16 > 4 > 531-538
Polish Journal of Environmental Studies > 2007 > 16 > 5 > 785-780
Polish Journal of Environmental Studies > 2008 > 17 > 5 > 817-821
Polish Journal of Environmental Studies > 2009 > 18 > 2 > 273-277