목록 관리 검색 Cryogen-free operation of programmable Josephson voltage standard with a closed-cycle refrigerator Author Chong, Y.; Kim, M.-S.; Kim, W.-S.; Kim, K.-T. Journal 2008 Conference on Precision Electromagnetic Measurements Digest. IEEE Page 586-587 Year 2008 https://ieeexplore.ieee.org/abstract/document/4574915