@misc{jones_instrument_and_2003, 
author={Jones, J.M.,Widmann, M.},
title={Instrument- and Tree-Ring-Based Estimates of the Antarctic Oscillation},
year={2003},
howpublished = {conference poster: Hamburg (D); 15.-19.09.2003},
note = {Online available at: \url{} (DOI). Jones, J.; Widmann, M.: Instrument- and Tree-Ring-Based Estimates of the Antarctic Oscillation. In: International Conference on Earth System Modelling. Hamburg (D). 2003.}}