TY - JOUR AU - Martinis, John AU - Nahum, M. AU - Jensen, H. C2 - Physica B-Condensed Matter DA - 1994-12-31 00:12:00 LA - en M1 - 194-196 PB - Physica B-Condensed Matter PY - 1994 TI - Testing for Metrological Accuracy of the Electron Pump ER -