PHYSICAL REVIEW LETTERS, vol. 103, no. 4, page. 47003 - 47003, 2009-07-24
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, vol. 21, no. 12, page. 125004 - 125004, 2008-12
JOURNAL OF PHYSICS-CONDENSED MATTER, vol. 20, no. 25, 2008-06-25
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 50, no. 5, page. 1466 - 1470, 2007-05