APPLIED PHYSICS LETTERS, vol. 84, no. 13, page. 2343 - 2345, 2004-03-29
APPLIED PHYSICS LETTERS, vol. 81, no. 17, page. 3257 - 3259, 2002-10-21
, 2004-01
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, vol. 21, no. 2-4, page. 1046 - 1052, 2004-03