1. Igor Sikorsky Kyiv Polytechnic Institute Faculty of Electronics Technische Universität Dresden Institute of Power Engineering,Kyiv,Ukaraine
2. Technische Universität Dresden Institute of Power Engineering Chair of building energy systems and heat supply,Dresden,Germany
3. Igor Sikorsky Kyiv Polytechnic Institute Faculty of Electronics,Department of electronic devices and systems,Kyiv,Ukaraine