@misc{benkel_the_role_2007, 
author={Benkel, A.},
title={The Role of Northern Hemispheric Cryospheric Albedo Changes: A Model Study of the Arctic’s Impact on the Global Climate (Dissertation)},
year={2007},
howpublished = {GKSS report},
note = {Benkel, A.: The Role of Northern Hemispheric Cryospheric Albedo Changes: A Model Study of the Arctic’s Impact on the Global Climate (Dissertation). Universitaet Hamburg, FB Geowissenschaften, 2007.}}