@article{PB-B817CF550BE7E711DEFF,
  title = {Could Vikings have navigated under foggy and cloudy conditions by skylight polarization? On the atmospheric optical prerequisites of polarimetric Viking navigation under foggy and cloudy skies},
  author = {Ramón Hegedüs and Susanne Åkesson and Rüdiger Wehner and Gábor Horváth},
  journal = {Proceedings of the Royal Society A Mathematical Physical and Engineering Sciences},
  year = {2007},
  doi = {10.1098/rspa.2007.1811}
}