@article{Mathieu:4174,
      author        = "Mathieu, Sophie and von Sachs, Rainer  and Ritter,
                       Christian  and Delouille, Véronique and Lefèvre, Laure",
      title         = "{Uncertainty Quantification in Sunspot Counts}",
      month         = "Oct",
      year          = "2018",
}