PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, vol. 228, no. 2, page. 621 - 624, 2001-11
PHYSICA STATUS SOLIDI C, no. 1, page. 223 - 226, 2002-12
PHYSICA STATUS SOLIDI (C), no. 1, page. 214 - 218, 2002-01