Affiliation: | 1. Department of Nutrition and Tourism, University of Food Technologies, Plovdiv, Bulgaria;2. Department of Technology of Tobacco, Sugar, Vegetable and Essential oils, University of Food Technologies, Plovdiv, Bulgaria;3. Department of Informatics and Statistics, University of Food Technologies, Plovdiv, Bulgaria;4. Department of Industrial Business and Entrepreneurship, University of Food Technologies, Plovdiv, Bulgaria |