Beliaev, V. K., and H. N. Panenko. “DETERMINATION OF INSULATION PARAMETERS OF CURRENT TRANSFORMERS AT MULTIPLE MEASUREMENTS IN MONITORING SYSTEMS UNDER WORKING VOLTAGE”. Electrical Engineering & Electromechanics, no. 5, Oct. 2016, pp. 40-46, doi:10.20998/2074-272X.2016.5.06.