TY - GEN AU - Uhlig, K T1 - He-3/He-4 dilution refrigerator with pulse-tube refrigerator precooling CY - PY - 2002 PB - T3 - Cryogenics VL - 42 UR - http://dx.doi.org/10.1016/S0011-2275(02)00002-4 SN - 0011-2275