1.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1996.
German | 29 DE |
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1994.
German | 29 DE |
3.
[Place of publication not identified] : [publisher not identified], 1986.
German | 29 DE |
4.
Courbevoie [France] : Institut National de la Propriété Industrielle, 1987.
French | 10A OMPI |