FEMTOVOLTMETER AND VOLTAGE TUNABLE HETERODYNE RECEIVER BASED ON THE dc RESISTIVE SQUID B. T. Ulrich, R.W. Van der Heijden et J. M.V. VerschuerenJ. Phys. Colloques, 39 C6 (1978) C6-1221-C6-1222DOI: https://doi.org/10.1051/jphyscol:19786540
