Berghoefer TITJUR Opinion of Mr Advocate General Sir Gordon Slynn delivered on 11 June 1985. # F. Berghoefer GmbH & Co. KG v ASA SA. # Reference for a preliminary ruling: Bundesgerichtshof - Germany. # Brussels Convention - Interpretation of Article 17 - Validity of an oral jurisdiction agreement confirmed in writing by one party only. # Case 221/84.