1. 1 researcher, Research Institute of Organic Agriculture , Budapest , Hungary
2. 2 Ph.D., director, Research Institute of Organic Agriculture , Budapest , Hungary
3. 3 Ph.D., research fellow, Budapest Business University , Budapest , Hungary , assistant professor, Eötvös Loránd University , Budapest , Hungary
4. 4 Ph.D. habil., college professor, Budapest Business University , Budapest , Hungary
5. 5 Ph.D., associated professor, Hungarian University of Agriculture and Life Sciences , Gödöllö , Hungary