Isolated matrix converters = Isoleeritud maatriksmuunduridKorkh, Oleksandr2021 https://www.ester.ee/record=b5395693*est https://digikogu.taltech.ee/et/Item/34baf9fc-42aa-45ce-b071-3b8886c7903e https://doi.org/10.23658/taltech.4/2021