1. Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
2. Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
3. Interbalkan Environment Center, 18 Loutron Str., 57200 Lagadas, Greece
4. Union of Agricultural Cooperatives of Naxos, 84300 Cyclades, Greece
5. Department of General, Analytical and Physical Chemistry, Montanuniversität Leoben, Franz Josef-Straße 18, 8700 Leoben, Austria