Daniel Jancarczyk. "INVESTIGATION OF LOW - FREQUENCY NOISE EMITTED BY POWER TRANSFORMER." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 19th International Multidisciplinary Scientific GeoConference SGEM2019, Informatics, Geoinformatics and Remote Sensing (2019): 927-934. https://doi.org/10.5593/sgem2019/2.1/s08.120