PHYSICA STATUS SOLIDI B-BASIC RESEARCH, vol. 208, no. 1, page. 129 - 135, 1998-07
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 58, no. 4, page. 725 - 729, 2011-04
JOURNAL OF SUPERCONDUCTIVITY, vol. 17, no. 2, page. 183 - 186, 2004-04