@misc{wagner_the_role_2004, 
author={Wagner, S.},
title={The role of different forcings on the historical climate variability, with special consideration of the Dalton Minimum (1790-1830): A model study (Dissertation)},
year={2004},
howpublished = {doctoral thesis,GKSS report},
note = {Online available at: \url{} (DOI). Wagner, S.: The role of different forcings on the historical climate variability, with special consideration of the Dalton Minimum (1790-1830): A model study (Dissertation). Universitaet Hamburg, FB Geowissenschaften, 2004.}}