Expert Discussion
T. Schnor (Copenhague - Denmark), J. Smith (Cardiff - UK), P. Le Brun (Leyden - Netherlands), I. Kramer (Mainz - Germany), JD. Hecq (Namur - Belgium), J. Vigneron (Nancy - France), T. Agasoster (Oslo - Norway)
Presentations by experts on problems, solutions, advantages and limitations