1
2
3
4
5
6
7
8
9
10
Solid state communications, 115 (2000) S. 145
11
12
13
The @journal of chemical physics, 112 (2000) S. 2021
OpenAccess 
14
Solid state communications, 114 (2000) S. 261
15
16
17
Journal of physics / Condensed matter, 11 (1999) S. 345 - 359
18
19
20