by (Netherlands)J.Cheeger;by (Federal Republic of Germany)O.Forster; by (Netherlands)M.Fabkas;by (Federal Republic of Germany)M.A.Aizerman; by (Netherlands)C.Berge...et al;by (Federal Republic of Germany)M.Aigner; by (Netherlands)N.C.Gecknli...et al;by (Federal Republic of Germany)H.J.Nussbaumer; by (Netherlands)N.N.Vakhania; (Federal Republic of Germany)R.M.Aron...et al; by (Denmark)R.Engelking;by (Federal Republic of Germany)H.Federer; by (United States)R.P.Sperb;by (Federal Republic of Germany)O.Vejvoda; by (United States)C.Kittel;by (Federal Republic of Germany)O.Madelung; by (United States)J.C.Slater;by (Federal Republic of Germany)H.L.Cycon...et al; by (Italy)A.Paganini;by (Federal Republic of Germany)J.S.Bach;