1. Department of Strategy and Business Planning, Faculty of Management, Lublin University of Technology, 20-618 Lublin, Poland
2. Institute of Environmental Protection Engineering, Faculty of Environmental Engineering, Lublin University of Technology, 20-618 Lublin, Poland
3. Department of Economics and Economic Management, Faculty of Management, Lublin University of Technology, 20-618 Lublin, Poland
4. Department of Structural Mechanics, Faculty of Civil Engineering and Architecture, Lublin University of Technology, 20-618 Lublin, Poland
5. Department of Applied Mathematics, Faculty of Technology Fundamentals, Lublin University of Technology, 20-618 Lublin, Poland