• Combined active frequency drift islanding detection method for NZEB energy routerJalakas, Tanel; Roasto, Indrek; Najafzadeh, Mahdiyyeh2019 IEEE 60th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), 7-9 October 2019 : conference proceedings2019 / 6 p https://doi.org/10.1109/RTUCON48111.2019.8982258