P. Sutkovyi, Yu. Minov, P. Shpylovyi, Ye. Melnyk, and M. Mudrenko, Optimization of low-pass filters in a flux transformer of a SQUID magnetometer for MCG studies, Low Temp. Phys. 48, (2022) [Fiz. Nyzk. Temp. 48, 582-586, (2022)] DOI: https://doi.org/10.1063/10.0011597.