Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Azuma Hideki and Harada Nariaki and Sonoda Toshikatsu,Measurement of Nano-Voltages using Pre-Amplifier with Magnetic Shield,"IEEJ Transactions on Electronics, Information and Systems",03854221,The Institute of Electrical Engineers of Japan,1998,118,11,1663-1669,https://cir.nii.ac.jp/crid/1390282679583747968,https://doi.org/10.1541/ieejeiss1987.118.11_1663