Brouwer, R; Hengstman, G J D; Egberts, W Vree; Ehrfeld, H; Bozic, B; Ghirardello, A; Grøndal, G; Hietarinta, M; Isenberg, D; Kalden, J R; Lundberg, I; Moutsopoulos, H; Roux-Lombard, P; Vencovsky, J; Wikman, A; Seelig, H P; van Engelen, B G M; van Venrooij, W J