EPE EPE 2020 : 21st International scientific conference on electric power engineering. Prague, Czech Republic. October 19-21, 2020 / ed. Zdeněk Müller, Miroslav Müller. -- Prague : Czech Technical University in Prague, 2020. -- ISBN : 978-1-7281-9479-0. -- 978-1-7281-9478-3 (USB). -- ISSN : 2376-5631. -- CFP2073X-ART. Müller, Zdeněk. Müller, Miroslav