1.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1978.
German | 28 DE |
2.
3.
München [Germany] : Mitteilungen der deutschen Patentanwälte, 1981.
German | 43 DE |
4.
5.
London [England] : Informa Law, 1989.
English | 53 GB |
6.