1
2
3
International journal of differential equations and applications, 3 (2001) S. 339 - 351
OpenAccess  OpenAccess 
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
The @journal of chemical physics, 111 (1999) S. 4663 - 4671
OpenAccess  OpenAccess