1.
[Place of publication not identified] : [publisher not identified], 1999.
French | 34 DE |
2.
3.
[Place of publication not identified] : [publisher not identified], 1999.
English | 34 DE |
4.
5.
6.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1997.
German | 29 DE |
7.
8.
9.
10.