@misc{behnert_aerosol_optical_2004, 
author={Behnert, I.,Matthias, V.,Doerffer, R.},
title={Aerosol optical thickness and its spectral dependence derived from sunphotometer measurements over the southern North Sea coastal region},
year={2004},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Behnert, I.; Matthias, V.; Doerffer, R.: Aerosol optical thickness and its spectral dependence derived from sunphotometer measurements over the southern North Sea coastal region. Optica Pura y Aplicada. 2004. vol. 37, no. 3, 3254-3257.}}