Defence date: 17 January 1997
Examining board: Prof. Stefano Bartolini (EUI) ; Prof. Hans-Peter Blossfeld (University of Bremen, supervisor) ; Prof. Klaus Eder (University of Berlin, co-supervisor) ; Prof. François Rastier (University of Paris IV Sorbonne, CNRS) ; Prof. Bernard Victorri (University of Caen, CNRS)