. . . . . . "Comparison and sensitivity studies of the land-surface schemes in the ECHAM general circulation model and Europa-modell" . . . . . . . . . "Comparison and sensitivity studies of the land-surface schemes in the ECHAM General Circulation Model and the Europa-Modell" . . . . . "Comparison and sensitivity studies of the land-surface schemes in the ECHAM general circulation model and the Europa-modell" .