Thus, the crisis of 1987 was followed by a series of negotiations and agreements in Davos and Brussels in 1988. Again, after the Imia crisis of 1996, there came an agreement over peaceful neighbourly relations reached at a meeting in Madrid in 1997. The period since about 1999 has been marked by a steady improvement of bilateral relations. For years, the Aegean dispute has been a matter not only about conflicting claims of substance. Rather, proposed strategies of how to resolve the substantial differences have themselves constituted a matter of heated dispute. Whereas Turkey has traditionally preferred to regard the whole set of topics as a political issue, requiring bilateral political negotiation, Greece views them as separate and purely legal issues, requiring only the application of existing principles of international law. Turkey has advocated direct negotiation, with a view to establishing what it would regard as an equitable compromise. Greece refuses to accept any process that would put it under pressure to engage in a give-and-take over what it perceives as inalienable and unnegotiable sovereign rights. Up to the late 1990s, the only avenue of conflict resolution that Greece deemed acceptable was to submit the issues separately to the International Court of Justice in The Hague. The resulting stalemate between both sides over process was partially changed after 1999, when the European summit of Helsinki opened up a path towards Turkey's accession to the EU. In the summit agreement, Turkey accepted an obligation to solve its bilateral disputes with Greece before actual accession talks would start. This was perceived as giving Greece a new tactical advantage over Turkey in determining which paths of conflict resolution to choose. During the following years, both countries held regular bilateral talks on the level of technical specialists, trying to determine possible future procedures. According to press reports, both sides seemed close to an agreement about how to submit the dispute to the court at The Hague, a step which would have fulfilled many of the old demands of Greece. However, a newly elected Greek government under Kostas Karamanlis, soon after it took office in March 2004, opted out of this plan, because Ankara was insisting that all the issues, including Imia and the "grey zones", belonged to a single negotiating item. Athens saw them as separate. However, Greek policy remained at the forefront in advocating closer links between Ankara and the EU. This resulted