1. Senckenberg Research Institute and Natural Museum Frankfurt Germany
2. Institute for Geosciences, University of Bonn Bonn Germany
3. Botanical Department Hungarian Natural History Museum Budapest Hungary
4. Unité de Modélisation du Climat et des Cycles Biogéochimiques (UMCCB), Université de Liège Liege Belgium
5. Palaeobotanical Department, Komarov Botanical Institute of RAS St. Petersburg Russia