TY - JOUR AU - Donald McDonald AU - F. Petersen AU - J. Cupp AU - B. Danielson AU - E. Johnson C2 - Applied Physics Letters DA - 1974-04-01 00:04:00 LA - en M1 - 24 PB - Applied Physics Letters PY - 1974 TI - Josephson Junctions at 45 Times the Energy-Gap Frequency ER -