1. Department of Vegetable Foodstuffs Hygiene and Technology, Faculty of Veterinary Hygiene and Ecology University of Veterinary and Pharmaceutical Sciences Brno Palackeho tr. 1946/1 Brno 61242 Czech Republic
2. Department of Technology and Organization of Public Catering South Ural State University Lenin Prospect 76 Chelyabinsk 454080 Russia