Robert Waraczewski, MSc and Anna Krajewska, MSc, University of Belgrade (Serbia)
Katarzyna Kuśmierz, MSc and Sebastian Kuśmierz, MSc, Swedish University of Agricultural Sciences
Anna Krajewska, MSc, University of Natural Resources and Life Sciences in Vienna, Austria
Anna Krajewska, MSc and Robert Waraczewski, MSc, Hungarian University of Agriculture and Life Sciences (MATE)
Patrycja Skowronek, MSc and Adam Staniszewski MSc, Agricultural Institute of Slovenia in Ljubljana (Slovenia)